diff --git a/3rdparty/include/meojson/json.hpp b/3rdparty/include/meojson/json.hpp
index dc18989d31..bbef928765 100644
--- a/3rdparty/include/meojson/json.hpp
+++ b/3rdparty/include/meojson/json.hpp
@@ -30,7 +30,7 @@ namespace json
         using array_ptr = std::unique_ptr<array>;
         using object_ptr = std::unique_ptr<object>;
     public:
-        enum class value_type : char
+        enum class value_type: char
         {
             Invalid,
             Null,
@@ -87,6 +87,9 @@ namespace json
         bool is_string() const noexcept { return _type == value_type::String; }
         bool is_array() const noexcept { return _type == value_type::Array; }
         bool is_object() const noexcept { return _type == value_type::Object; }
+        template<typename Type>
+        bool is() const noexcept;
+
         bool contains(const std::string& key) const;
         bool contains(size_t pos) const;
         bool exists(const std::string& key) const { return contains(key); }
@@ -117,6 +120,8 @@ namespace json
         const std::string as_string() const;
         const array& as_array() const;
         const object& as_object() const;
+        template<typename Type>
+        Type as() const;
 
         array& as_array();
         object& as_object();
@@ -394,11 +399,11 @@ namespace json
     // *************************
     // *   exception declare   *
     // *************************
-    class exception : public std::exception
+    class exception: public std::exception
     {
     public:
         exception() = default;
-        exception(const std::string& msg) : _what(msg) {}
+        exception(const std::string& msg): _what(msg) {}
 
         exception(const exception&) = default;
         exception& operator=(const exception&) = default;
@@ -525,6 +530,40 @@ namespace json
     // for Pimpl
     MEOJSON_INLINE value::~value() = default;
 
+    template<typename Type>
+    MEOJSON_INLINE bool value::is() const noexcept
+    {
+        if constexpr (std::is_same_v<Type, value>) {
+            return true;
+        }
+        else if constexpr (std::is_same_v<Type, bool>) {
+            return _type == value_type::Boolean;
+        }
+        else if constexpr (std::is_same_v<Type, int> ||
+            std::is_same_v<Type, unsigned> ||
+            std::is_same_v<Type, long> ||
+            std::is_same_v<Type, unsigned long> ||
+            std::is_same_v<Type, long long> ||
+            std::is_same_v<Type, unsigned long long> ||
+            std::is_same_v<Type, float> ||
+            std::is_same_v<Type, double> ||
+            std::is_same_v<Type, long double>) {
+            return _type == value_type::Number;
+        }
+        else if constexpr (std::is_same_v<Type, std::string>) {
+            return _type == value_type::String;
+        }
+        else if constexpr (std::is_same_v<Type, array>) {
+            return _type == value_type::Array;
+        }
+        else if constexpr (std::is_same_v<Type, object>) {
+            return _type == value_type::Object;
+        }
+        else {
+            static_assert(false, "Unsupported type");
+        }
+    }
+
     MEOJSON_INLINE bool value::contains(const std::string& key) const
     {
         return is_object() && as_object().contains(key);
@@ -782,6 +821,12 @@ namespace json
         throw exception("Wrong Type or data empty");
     }
 
+    template<typename Type>
+    MEOJSON_INLINE Type value::as() const
+    {
+        return static_cast<Type>(*this);
+    }
+
     MEOJSON_INLINE const std::string& value::as_basic_type_str() const
     {
         return std::get<std::string>(_raw_data);
@@ -1308,7 +1353,8 @@ namespace json
         if (!contains(pos)) {
             return std::nullopt;
         }
-        return static_cast<Type>(_array_data.at(pos));
+        const auto& val = _array_data.at(pos);
+        return val.is<Type>() ? std::optional<Type>(val.as<Type>()) : std::nullopt;
     }
 
     MEOJSON_INLINE array::iterator array::begin() noexcept
@@ -1765,7 +1811,8 @@ namespace json
         if (iter == _object_data.end()) {
             return std::nullopt;
         }
-        return static_cast<Type>(iter->second);
+        const auto& val = iter->second;
+        return val.is<Type>() ? std::optional<Type>(val.as<Type>()) : std::nullopt;
     }
 
     MEOJSON_INLINE object::iterator object::begin() noexcept
diff --git a/resource/battle_data.json b/resource/battle_data.json
index e2b928782c..bea11726f6 100644
--- a/resource/battle_data.json
+++ b/resource/battle_data.json
@@ -20,7 +20,10 @@
                 "3-8",
                 "3-10"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "Mon3tr"
+            ]
         },
         "char_009_12fce": {
             "name": "12F",
@@ -86,7 +89,10 @@
                 "x-1",
                 "x-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "斯卡蒂的海嗣"
+            ]
         },
         "char_1013_chen2": {
             "name": "假日威龙陈",
@@ -108,7 +114,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "“耀阳”"
+            ]
         },
         "char_101_sora": {
             "name": "空",
@@ -251,7 +260,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "医疗探机"
+            ]
         },
         "char_109_fmout": {
             "name": "远山",
@@ -273,7 +285,10 @@
                 "3-1",
                 "3-1"
             ],
-            "rarity": 4
+            "rarity": 4,
+            "tokens": [
+                "触手"
+            ]
         },
         "char_112_siege": {
             "name": "推进之王",
@@ -295,7 +310,10 @@
                 "3-8",
                 "3-10"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "此面向敌"
+            ]
         },
         "char_115_headbr": {
             "name": "凛冬",
@@ -746,7 +764,10 @@
                 "y-2",
                 "y-2"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "幻影"
+            ]
         },
         "char_180_amgoat": {
             "name": "艾雅法拉",
@@ -933,7 +954,10 @@
                 "3-6",
                 "3-6"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "\"小自在\""
+            ]
         },
         "char_201_moeshd": {
             "name": "可颂",
@@ -955,7 +979,12 @@
                 "3-1",
                 "3-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "“清平”",
+                "“逍遥”",
+                "“弦惊”"
+            ]
         },
         "char_202_demkni": {
             "name": "塞雷娅",
@@ -1219,7 +1248,10 @@
                 "3-1",
                 "3-1"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "机械水獭"
+            ]
         },
         "char_243_waaifu": {
             "name": "槐琥",
@@ -1241,7 +1273,12 @@
                 "3-1",
                 "3-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "龙腾.F",
+                "龙腾.L",
+                "龙腾.A"
+            ]
         },
         "char_250_phatom": {
             "name": "傀影",
@@ -1252,7 +1289,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "镜中虚影"
+            ]
         },
         "char_252_bibeak": {
             "name": "柏喙",
@@ -1285,7 +1325,10 @@
                 "y-6",
                 "y-6"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "诅咒娃娃"
+            ]
         },
         "char_258_podego": {
             "name": "波登可",
@@ -1725,7 +1768,10 @@
                 "3-1",
                 "3-1"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "移动摄影器"
+            ]
         },
         "char_337_utage": {
             "name": "宴",
@@ -1780,7 +1826,10 @@
                 "x-1",
                 "x-1"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "沙之碑"
+            ]
         },
         "char_345_folnic": {
             "name": "亚叶",
@@ -2055,7 +2104,10 @@
                 "3-9",
                 "3-9"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "迷迭香的战术装备"
+            ]
         },
         "char_4000_jnight": {
             "name": "正义骑士号",
@@ -2099,7 +2151,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "工程蓄水炮"
+            ]
         },
         "char_4013_kjera": {
             "name": "耶拉",
@@ -2132,7 +2187,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "纸偶"
+            ]
         },
         "char_4017_puzzle": {
             "name": "谜图",
@@ -2286,7 +2344,10 @@
                 "3-14",
                 "3-14"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "旧日残影"
+            ]
         },
         "char_4047_pianst": {
             "name": "车尔尼",
@@ -2308,7 +2369,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "共振装置"
+            ]
         },
         "char_4054_malist": {
             "name": "至简",
@@ -2330,7 +2394,10 @@
                 "3-6",
                 "3-6"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "“打字机”"
+            ]
         },
         "char_405_absin": {
             "name": "苦艾",
@@ -2429,7 +2496,12 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "白铁™多功能平台",
+                "白铁™多功能平台",
+                "铁钳号·原型机"
+            ]
         },
         "char_411_tomimi": {
             "name": "特米米",
@@ -2528,7 +2600,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 6
+            "rarity": 6,
+            "tokens": [
+                "狼群"
+            ]
         },
         "char_430_fartth": {
             "name": "远牙",
@@ -2561,7 +2636,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "可靠电池"
+            ]
         },
         "char_436_whispr": {
             "name": "絮雨",
@@ -2616,7 +2694,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "\"夹子\""
+            ]
         },
         "char_452_bstalk": {
             "name": "豆苗",
@@ -2627,7 +2708,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 4
+            "rarity": 4,
+            "tokens": [
+                "磐蟹护卫队"
+            ]
         },
         "char_455_nothin": {
             "name": "乌有",
@@ -2671,7 +2755,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "迎宾踏垫"
+            ]
         },
         "char_459_tachak": {
             "name": "战车",
@@ -2759,7 +2846,10 @@
                 "3-3",
                 "3-3"
             ],
-            "rarity": 5
+            "rarity": 5,
+            "tokens": [
+                "眠兽"
+            ]
         },
         "char_478_kirara": {
             "name": "绮良",
@@ -2792,7 +2882,10 @@
                 "1-1",
                 "1-1"
             ],
-            "rarity": 4
+            "rarity": 4,
+            "tokens": [
+                "全自动造型仪"
+            ]
         },
         "char_485_pallas": {
             "name": "帕拉斯",
diff --git a/src/MaaCore/Common/AsstBattleDef.h b/src/MaaCore/Common/AsstBattleDef.h
index a2ed15e78a..2c7fe43313 100644
--- a/src/MaaCore/Common/AsstBattleDef.h
+++ b/src/MaaCore/Common/AsstBattleDef.h
@@ -129,6 +129,7 @@ namespace asst::battle
         std::array<std::string, 3> ranges;
         int rarity = 0;
         LocationType location_type = LocationType::None;
+        std::vector<std::string> tokens; // 召唤物名字
     };
 
     using AttackRange = std::vector<Point>;
diff --git a/src/MaaCore/Config/Miscellaneous/BattleDataConfig.cpp b/src/MaaCore/Config/Miscellaneous/BattleDataConfig.cpp
index 46fd8f356b..6f2a37e197 100644
--- a/src/MaaCore/Config/Miscellaneous/BattleDataConfig.cpp
+++ b/src/MaaCore/Config/Miscellaneous/BattleDataConfig.cpp
@@ -47,6 +47,12 @@ bool asst::BattleDataConfig::parse(const json::value& json)
         const auto& rarity = char_data_json.at("rarity").as_integer();
         data.rarity = rarity;
 
+        if (auto tokens_opt = char_data_json.find<json::array>("tokens")) {
+            for (const auto& token : *tokens_opt) {
+                data.tokens.emplace_back(token.as_string());
+            }
+        }
+
         m_chars.emplace(std::move(name), std::move(data));
     }
     for (const auto& [id, points_json] : json.at("ranges").as_object()) {
diff --git a/src/MaaCore/Config/Miscellaneous/BattleDataConfig.h b/src/MaaCore/Config/Miscellaneous/BattleDataConfig.h
index 9ae2ca6609..30bece6647 100644
--- a/src/MaaCore/Config/Miscellaneous/BattleDataConfig.h
+++ b/src/MaaCore/Config/Miscellaneous/BattleDataConfig.h
@@ -64,6 +64,16 @@ namespace asst
             return range_iter->second;
         }
 
+        const std::vector<std::string>& get_tokens(const std::string& name) const
+        {
+            auto char_iter = m_chars.find(name);
+            if (char_iter == m_chars.cend()) {
+                static const std::vector<std::string> Empty;
+                return Empty;
+            }
+            return char_iter->second.tokens;
+        }
+
     protected:
         virtual bool parse(const json::value& json) override;
 
diff --git a/src/MaaCore/MaaCore.vcxproj.filters b/src/MaaCore/MaaCore.vcxproj.filters
index 855761ced7..efce386b86 100644
--- a/src/MaaCore/MaaCore.vcxproj.filters
+++ b/src/MaaCore/MaaCore.vcxproj.filters
@@ -459,6 +459,9 @@
     <ClInclude Include="Task\BattleHelper.h">
       <Filter>源文件\Task</Filter>
     </ClInclude>
+    <ClInclude Include="Utils\Algorithm.hpp">
+      <Filter>源文件\Utils</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Vision\AbstractImageAnalyzer.cpp">
diff --git a/src/MaaCore/Task/BattleHelper.cpp b/src/MaaCore/Task/BattleHelper.cpp
index 4a2f584761..50bf95fba3 100644
--- a/src/MaaCore/Task/BattleHelper.cpp
+++ b/src/MaaCore/Task/BattleHelper.cpp
@@ -44,6 +44,41 @@ bool asst::BattleHelper::calc_tiles_info(const std::string& stage_name)
     return true;
 }
 
+bool asst::BattleHelper::load_avatar_cache(const std::string& name)
+{
+    LogTraceFunction;
+
+    if (name.empty()) {
+        return false;
+    }
+    auto path = AvatarCacheDir / utils::path(name + CacheExtension);
+    Log.info(path);
+
+    if (!std::filesystem::exists(path)) {
+        Log.info(path, "not exists");
+        return false;
+    }
+    cv::Mat avatar = asst::imread(path);
+    if (avatar.empty()) {
+        Log.info(path, "image is empty");
+        return false;
+    }
+    m_all_deployment_avatars.emplace(name, std::move(avatar));
+    Log.info(path, "loaded");
+    return true;
+}
+
+void asst::BattleHelper::save_avatar_cache(const std::string& name, const cv::Mat& avatar)
+{
+    LogTraceFunction;
+
+    auto path = AvatarCacheDir / utils::path(name + CacheExtension);
+    Log.info(path);
+
+    std::filesystem::create_directories(AvatarCacheDir);
+    asst::imwrite(path, avatar);
+}
+
 bool asst::BattleHelper::pause()
 {
     LogTraceFunction;
@@ -151,6 +186,7 @@ bool asst::BattleHelper::update_deployment(bool init)
             oper.name = name;
             m_cur_deployment_opers.insert_or_assign(name, oper);
             m_all_deployment_avatars.insert_or_assign(name, oper.avatar);
+            save_avatar_cache(name, oper.avatar);
         }
         pause();
         cancel_oper_selection();
diff --git a/src/MaaCore/Task/BattleHelper.h b/src/MaaCore/Task/BattleHelper.h
index 29c9193c57..77a78cbfe9 100644
--- a/src/MaaCore/Task/BattleHelper.h
+++ b/src/MaaCore/Task/BattleHelper.h
@@ -6,6 +6,8 @@
 #include "Config/Miscellaneous/TilePack.h"
 #include "InstHelper.h"
 #include "Utils/NoWarningCVMat.h"
+#include "Utils/Platform.hpp"
+#include "Utils/WorkingDir.hpp"
 
 #include <map>
 
@@ -13,6 +15,9 @@ namespace asst
 {
     class BattleHelper
     {
+        inline static const auto AvatarCacheDir = UserDir.get() / utils::path("cache") / utils::path("avatars");
+        inline static const std::string CacheExtension = ".png";
+
     public:
         ~BattleHelper() = default;
 
@@ -22,6 +27,8 @@ namespace asst
         virtual bool set_stage_name(const std::string& name);
 
         bool calc_tiles_info(const std::string& stage_name);
+        bool load_avatar_cache(const std::string& name);
+        void save_avatar_cache(const std::string& name, const cv::Mat& avatar);
 
         bool pause();
         bool speed_up();
diff --git a/src/MaaCore/Task/Miscellaneous/BattleProcessTask.cpp b/src/MaaCore/Task/Miscellaneous/BattleProcessTask.cpp
index 155ea2b80a..d88b58386e 100644
--- a/src/MaaCore/Task/Miscellaneous/BattleProcessTask.cpp
+++ b/src/MaaCore/Task/Miscellaneous/BattleProcessTask.cpp
@@ -7,6 +7,7 @@
 
 #include "Utils/NoWarningCV.h"
 
+#include "Config/Miscellaneous/BattleDataConfig.h"
 #include "Config/Miscellaneous/CopilotConfig.h"
 #include "Config/Miscellaneous/TilePack.h"
 #include "Config/TaskData.h"
@@ -35,6 +36,7 @@ bool asst::BattleProcessTask::_run()
         return false;
     }
 
+    load_cache();
     update_deployment(true);
     to_group();
 
@@ -63,6 +65,23 @@ bool asst::BattleProcessTask::set_stage_name(const std::string& stage_name)
     return true;
 }
 
+void asst::BattleProcessTask::load_cache()
+{
+    LogTraceFunction;
+
+    for (const auto& oper_list : m_combat_data.groups | views::values) {
+        for (const auto& oper : oper_list) {
+            load_avatar_cache(oper.name);
+            if (auto tokens = BattleData.get_tokens(oper.name); !tokens.empty()) {
+                for (const std::string& token_name : tokens) {
+                    load_avatar_cache(token_name);
+                }
+            }
+        }
+    }
+    // TODO: 识别编队，额外加载编队中有的干员的缓存
+}
+
 bool asst::BattleProcessTask::to_group()
 {
     std::unordered_map<std::string, std::vector<std::string>> groups;
diff --git a/src/MaaCore/Task/Miscellaneous/BattleProcessTask.h b/src/MaaCore/Task/Miscellaneous/BattleProcessTask.h
index 6c4420d9dc..10e3965e27 100644
--- a/src/MaaCore/Task/Miscellaneous/BattleProcessTask.h
+++ b/src/MaaCore/Task/Miscellaneous/BattleProcessTask.h
@@ -21,6 +21,7 @@ namespace asst
         virtual bool _run() override;
         virtual AbstractTask& this_task() override { return *this; }
 
+        void load_cache();
         bool to_group();
         bool do_action(size_t action_index);
         void notify_action(const battle::copilot::Action& action);
diff --git a/src/MaaCore/Utils/Algorithm.hpp b/src/MaaCore/Utils/Algorithm.hpp
index d6006ea2fe..e4d3948399 100644
--- a/src/MaaCore/Utils/Algorithm.hpp
+++ b/src/MaaCore/Utils/Algorithm.hpp
@@ -7,7 +7,7 @@
 
 namespace asst::algorithm
 {
-    std::optional<std::unordered_map<std::string, std::string>> get_char_allocation_for_each_group(
+    static std::optional<std::unordered_map<std::string, std::string>> get_char_allocation_for_each_group(
         const std::unordered_map<std::string, std::vector<std::string>>& group_list,
         const std::unordered_set<std::string>& char_set)
     {
diff --git a/src/MaaCore/Vision/Miscellaneous/BattleImageAnalyzer.cpp b/src/MaaCore/Vision/Miscellaneous/BattleImageAnalyzer.cpp
index 118622ce59..5bfa8ae83d 100644
--- a/src/MaaCore/Vision/Miscellaneous/BattleImageAnalyzer.cpp
+++ b/src/MaaCore/Vision/Miscellaneous/BattleImageAnalyzer.cpp
@@ -129,7 +129,10 @@ bool asst::BattleImageAnalyzer::opers_analyze()
         if (oper.rect.x + oper.rect.width >= m_image.cols) {
             oper.rect.width = m_image.cols - oper.rect.x;
         }
-        oper.avatar = m_image(make_rect<cv::Rect>(oper.rect));
+        auto avatar_rect = make_rect<cv::Rect>(oper.rect);
+        avatar_rect.y += 30;
+        avatar_rect.height = 70;
+        oper.avatar = m_image(avatar_rect);
 
         Rect available_rect = flag_mrect.rect.move(avlb_move);
         oper.available = oper_available_analyze(available_rect);
diff --git a/tools/ResourceUpdater/main.cpp b/tools/ResourceUpdater/main.cpp
index 9985e009ca..90fae05658 100644
--- a/tools/ResourceUpdater/main.cpp
+++ b/tools/ResourceUpdater/main.cpp
@@ -646,7 +646,8 @@ bool update_battle_chars_info(const std::filesystem::path& input_dir, const std:
         range.emplace(id, std::move(points));
     }
 
-    auto& chars = result["chars"].as_object();
+    auto& chars = result["chars"];
+    std::map<std::string, std::vector<std::string>> tokens;
     for (auto& [id, char_data] : chars_json.as_object()) {
         json::value char_new_data;
         std::string name = char_data["name"].as_string();
@@ -662,15 +663,36 @@ bool update_battle_chars_info(const std::filesystem::path& input_dir, const std:
         char_new_data["rarity"] = static_cast<int>(char_data["rarity"]) + 1;
         char_new_data["position"] = char_data["position"];
 
-        chars.emplace(id, std::move(char_new_data));
+        if (auto token_opt = char_data.find<std::string>("tokenKey")) {
+            tokens[id].emplace_back(*token_opt);
+        }
+        if (auto skill_opt = char_data.find<json::array>("skills")) {
+            for (const auto& skill_obj : *skill_opt) {
+                if (auto token_opt = skill_obj.find<std::string>("overrideTokenKey")) {
+                    tokens[id].emplace_back(*token_opt);
+                }
+            }
+        }
+        chars.object_emplace(id, std::move(char_new_data));
     }
+    for (const auto& [oper_id, token_id_list] : tokens) {
+        std::vector<std::string> token_names_list;
+        for (const auto& token_id : token_id_list) {
+            std::string token_name = chars.get(token_id, "name", std::string());
+            if (!token_name.empty()) {
+                token_names_list.emplace_back(token_name);
+            }
+        }
+        chars[oper_id]["tokens"] = json::array(token_names_list);
+    }
+
     json::value Amiya_data;
     Amiya_data["name"] = "阿米娅-WARRIOR";
     Amiya_data["profession"] = "WARRIOR";
     Amiya_data["rangeId"] = json::array { "1-1", "1-1", "1-1" };
     Amiya_data["rarity"] = 5;
     Amiya_data["position"] = "MELEE";
-    chars.emplace("char_1001_amiya2", std::move(Amiya_data));
+    chars.object_emplace("char_1001_amiya2", std::move(Amiya_data));
 
     const auto& out_file = output_dir / "battle_data.json";
     std::ofstream ofs(out_file, std::ios::out);