diff --git a/src/plugins/PFC/action_planner.py b/src/plugins/PFC/action_planner.py
index 63fe2cca..77347cdd 100644
--- a/src/plugins/PFC/action_planner.py
+++ b/src/plugins/PFC/action_planner.py
@@ -212,7 +212,7 @@ class ActionPlanner:
             goals_str = self._build_goals_string(conversation_info)
             chat_history_text = await build_chat_history_text(observation_info, self.private_name)
             # 获取 sender_name, relationship_text, current_emotion_text
-            sender_name_str = getattr(observation_info, "sender_name", "对方")  # 从 observation_info 获取
+            sender_name_str = self.private_name
             if not sender_name_str:
                 sender_name_str = "对方"  # 再次确保有默认值
 
diff --git a/src/plugins/PFC/conversation_loop.py b/src/plugins/PFC/conversation_loop.py
index d0cd287d..a71727e9 100644
--- a/src/plugins/PFC/conversation_loop.py
+++ b/src/plugins/PFC/conversation_loop.py
@@ -200,7 +200,7 @@ async def run_conversation_loop(conversation_instance: "Conversation"):
                 ):
                     last_user_msg = other_new_messages_during_planning[-1]
                     last_user_msg_text = last_user_msg.get("processed_plain_text", "用户发了新消息")
-                    sender_name_for_event = getattr(conversation_instance.observation_info, "sender_name", "对方")
+                    sender_name_for_event = conversation_instance.private_name
                     event_desc = f"用户【{sender_name_for_event}】发送了新消息: '{last_user_msg_text[:30]}...'"
                     await conversation_instance.emotion_updater.update_emotion_based_on_context(
                         conversation_info=conversation_instance.conversation_info,
diff --git a/src/plugins/PFC/observation_info.py b/src/plugins/PFC/observation_info.py
index 7b3d6279..a372b3dc 100644
--- a/src/plugins/PFC/observation_info.py
+++ b/src/plugins/PFC/observation_info.py
@@ -114,8 +114,6 @@ class ObservationInfo:
         """初始化 ObservationInfo"""
         self.private_name: str = private_name
 
-        # 新增：发信人信息
-        self.sender_name: Optional[str] = None
         self.sender_user_id: Optional[str] = None  # 存储为字符串
         self.sender_platform: Optional[str] = None
 
@@ -232,23 +230,20 @@ class ObservationInfo:
         if user_info:
             try:
                 self.sender_user_id = str(user_info.user_id)  # 确保是字符串
-                self.sender_name = user_info.user_nickname  # 或者 user_info.card 如果私聊时card更准
                 self.sender_platform = user_info.platform
                 current_message_sender_id = self.sender_user_id  # 用于后续逻辑
                 logger.debug(
-                    f"[私聊][{self.private_name}] 更新发信人信息: ID={self.sender_user_id}, Name={self.sender_name}, Platform={self.sender_platform}"
+                    f"[私聊][{self.private_name}] 更新发信人信息: ID={self.sender_user_id}, Name={self.private_name}, Platform={self.sender_platform}"
                 )
             except AttributeError as e:
                 logger.error(f"[私聊][{self.private_name}] 从 UserInfo 对象提取信息时出错: {e}, UserInfo: {user_info}")
                 # 如果提取失败，将这些新字段设为 None，避免使用旧数据
                 self.sender_user_id = None
-                self.sender_name = None
                 self.sender_platform = None
         else:
             logger.warning(f"[私聊][{self.private_name}] 处理消息更新时缺少有效的 UserInfo, message_id: {message_id}")
             # 如果没有 UserInfo，也将这些新字段设为 None
             self.sender_user_id = None
-            self.sender_name = None
             self.sender_platform = None
         # --- 新增/修改结束 ---
 
diff --git a/src/plugins/PFC/pfc_emotion.py b/src/plugins/PFC/pfc_emotion.py
index d2496520..c202d04a 100644
--- a/src/plugins/PFC/pfc_emotion.py
+++ b/src/plugins/PFC/pfc_emotion.py
@@ -71,9 +71,7 @@ class PfcEmotionUpdater:
         )
 
         current_mood_text_from_manager = self.mood_mng.current_mood.text  # 从 MoodManager 获取当前情绪文本
-        sender_name_for_prompt = getattr(observation_info, "sender_name", "对方")
-        if not sender_name_for_prompt:
-            sender_name_for_prompt = "对方"
+        sender_name_for_prompt = self.private_name
         relationship_text_for_prompt = getattr(
             conversation_info, "relationship_text", "关系一般。"
         )  # 从 ConversationInfo 获取关系文本
diff --git a/src/plugins/PFC/reply_generator.py b/src/plugins/PFC/reply_generator.py
index 426ef454..4a86dd66 100644
--- a/src/plugins/PFC/reply_generator.py
+++ b/src/plugins/PFC/reply_generator.py
@@ -218,9 +218,7 @@ class ReplyGenerator:
 
         chat_history_text = await build_chat_history_text(observation_info, self.private_name)
 
-        sender_name_str = getattr(observation_info, "sender_name", "对方")
-        if not sender_name_str:
-            sender_name_str = "对方"
+        sender_name_str = self.private_name
 
         relationship_text_str = getattr(conversation_info, "relationship_text", "你们还不熟悉。")
         current_emotion_text_str = getattr(conversation_info, "current_emotion_text", "心情平静。")