diff --git a/src/api/character.js b/src/api/character.js
index b090cd9..e4f9eb1 100644
--- a/src/api/character.js
+++ b/src/api/character.js
@@ -19,6 +19,14 @@ async function getCharacter(id) {
   return Vue.axios.get(`/admin/chat/character/${id}`)
 }
 
+// 내부 헬퍼: 빈 문자열을 null로 변환
+function toNullIfBlank(value) {
+  if (typeof value === 'string') {
+    return value.trim() === '' ? null : value;
+  }
+  return value === '' ? null : value;
+}
+
 // 캐릭터 등록
 async function createCharacter(characterData) {
   const formData = new FormData()
@@ -28,18 +36,18 @@ async function createCharacter(characterData) {
 
   // 나머지 데이터는 JSON 문자열로 변환하여 request 필드에 추가
   const requestData = {
-    name: characterData.name,
-    systemPrompt: characterData.systemPrompt,
-    description: characterData.description,
-    age: characterData.age,
-    gender: characterData.gender,
-    mbti: characterData.mbti,
-    characterType: characterData.type,
-    originalTitle: characterData.originalTitle,
-    originalLink: characterData.originalLink,
-    speechPattern: characterData.speechPattern,
-    speechStyle: characterData.conversationStyle,
-    appearance: characterData.appearance,
+    name: toNullIfBlank(characterData.name),
+    systemPrompt: toNullIfBlank(characterData.systemPrompt),
+    description: toNullIfBlank(characterData.description),
+    age: toNullIfBlank(characterData.age),
+    gender: toNullIfBlank(characterData.gender),
+    mbti: toNullIfBlank(characterData.mbti),
+    characterType: toNullIfBlank(characterData.type),
+    originalTitle: toNullIfBlank(characterData.originalTitle),
+    originalLink: toNullIfBlank(characterData.originalLink),
+    speechPattern: toNullIfBlank(characterData.speechPattern),
+    speechStyle: toNullIfBlank(characterData.speechStyle),
+    appearance: toNullIfBlank(characterData.appearance),
     tags: characterData.tags || [],
     hobbies: characterData.hobbies || [],
     values: characterData.values || [],
@@ -66,9 +74,18 @@ async function updateCharacter(characterData, image = null) {
   // 이미지가 있는 경우에만 FormData에 추가
   if (image) formData.append('image', image)
 
-  // 변경된 데이터만 JSON 문자열로 변환하여 request 필드에 추가
+  // 변경된 데이터만 JSON 문자열로 변환하여 request 필드에 추가 ('' -> null 변환)
   // characterData는 이미 변경된 필드만 포함하고 있음
-  formData.append('request', JSON.stringify(characterData))
+  const processed = {}
+  Object.keys(characterData).forEach(key => {
+    const value = characterData[key]
+    if (typeof value === 'string' || value === '') {
+      processed[key] = toNullIfBlank(value)
+    } else {
+      processed[key] = value
+    }
+  })
+  formData.append('request', JSON.stringify(processed))
 
   return Vue.axios.put(`/admin/chat/character/update`, formData, {
     headers: {
diff --git a/src/views/Chat/CharacterBanner.vue b/src/views/Chat/CharacterBanner.vue
index 5ea4bb6..5858852 100644
--- a/src/views/Chat/CharacterBanner.vue
+++ b/src/views/Chat/CharacterBanner.vue
@@ -197,7 +197,9 @@
                       </v-avatar>
                     </v-col>
                     <v-col>
-                      <div class="font-weight-medium">선택된 캐릭터: {{ selectedCharacter.name }}</div>
+                      <div class="font-weight-medium">
+                        선택된 캐릭터: {{ selectedCharacter.name }}
+                      </div>
                     </v-col>
                   </v-row>
                 </v-alert>
@@ -356,8 +358,9 @@ export default {
       try {
         const response = await getCharacterBannerList(this.page);
 
-        if (response && response.data) {
-          const newBanners = response.data.content || [];
+        if (response && response.status === 200 && response.data && response.data.success === true) {
+          const data = response.data.data;
+          const newBanners = data.content || [];
           this.banners = [...this.banners, ...newBanners];
 
           // 더 불러올 데이터가 있는지 확인
@@ -458,8 +461,9 @@ export default {
       try {
         const response = await searchCharacters(this.searchKeyword);
 
-        if (response && response.data) {
-          this.searchResults = response.data.content || [];
+        if (response && response.status === 200 && response.data && response.data.success === true) {
+          const data = response.data.data;
+          this.searchResults = data.content || [];
           this.searchPerformed = true;
         }
       } catch (error) {
@@ -482,19 +486,27 @@ export default {
       try {
         if (this.isEdit) {
           // 배너 수정
-          await updateCharacterBanner({
+          const response = await updateCharacterBanner({
             image: this.bannerForm.image,
             characterId: this.selectedCharacter.id,
             bannerId: this.bannerForm.bannerId
           });
-          this.notifySuccess('배너가 수정되었습니다.');
+          if (response && response.status === 200 && response.data && response.data.success === true) {
+            this.notifySuccess('배너가 수정되었습니다.');
+          } else {
+            this.notifyError('배너 수정을 실패했습니다.');
+          }
         } else {
           // 배너 추가
-          await createCharacterBanner({
+          const response = await createCharacterBanner({
             image: this.bannerForm.image,
             characterId: this.selectedCharacter.id
           });
-          this.notifySuccess('배너가 추가되었습니다.');
+          if (response && response.status === 200 && response.data && response.data.success === true) {
+            this.notifySuccess('배너가 추가되었습니다.');
+          } else {
+            this.notifyError('배너 추가를 실패했습니다.');
+          }
         }
 
         // 다이얼로그 닫고 배너 목록 새로고침
@@ -514,10 +526,14 @@ export default {
       this.isSubmitting = true;
 
       try {
-        await deleteCharacterBanner(this.selectedBanner.id);
-        this.notifySuccess('배너가 삭제되었습니다.');
-        this.showDeleteDialog = false;
-        this.refreshBanners();
+        const response = await deleteCharacterBanner(this.selectedBanner.id);
+        if (response && response.status === 200 && response.data && response.data.success === true) {
+          this.notifySuccess('배너가 삭제되었습니다.');
+          this.showDeleteDialog = false;
+          this.refreshBanners();
+        } else {
+          this.notifyError('배너 삭제에 실패했습니다.');
+        }
       } catch (error) {
         console.error('배너 삭제 오류:', error);
         this.notifyError('배너 삭제에 실패했습니다.');
@@ -538,8 +554,12 @@ export default {
       // 드래그 앤 드롭으로 순서 변경 후 API 호출
       try {
         const bannerIds = this.banners.map(banner => banner.id);
-        await updateCharacterBannerOrder(bannerIds);
-        this.notifySuccess('배너 순서가 변경되었습니다.');
+        const response = await updateCharacterBannerOrder(bannerIds);
+        if (response && response.status === 200 && response.data && response.data.success === true) {
+          this.notifySuccess('배너 순서가 변경되었습니다.');
+        } else {
+          this.notifyError('배너 순서 변경에 실패했습니다.');
+        }
       } catch (error) {
         console.error('배너 순서 변경 오류:', error);
         this.notifyError('배너 순서 변경에 실패했습니다.');
diff --git a/src/views/Chat/CharacterForm.vue b/src/views/Chat/CharacterForm.vue
index 9c638aa..c8af1b1 100644
--- a/src/views/Chat/CharacterForm.vue
+++ b/src/views/Chat/CharacterForm.vue
@@ -135,7 +135,7 @@
                 md="6"
               >
                 <v-select
-                  v-model="character.type"
+                  v-model="character.characterType"
                   :items="typeOptions"
                   label="캐릭터 유형"
                   outlined
@@ -235,7 +235,7 @@
             <v-row>
               <v-col cols="12">
                 <v-textarea
-                  v-model="character.conversationStyle"
+                  v-model="character.speechStyle"
                   label="대화 스타일 (최대 200자)"
                   outlined
                   auto-grow
@@ -962,11 +962,11 @@ export default {
         gender: '',
         age: '',
         mbti: '',
-        type: '',
+        characterType: '',
         originalTitle: '',
         originalLink: '',
         speechPattern: '',
-        conversationStyle: '',
+        speechStyle: '',
         appearance: '',
         systemPrompt: '',
         tags: [],
@@ -1277,6 +1277,27 @@ export default {
       this.backgrounds.splice(index, 1);
     },
 
+    // 공백과 null을 동일하게 취급하는 비교 함수
+    areEqualConsideringBlankNull(a, b) {
+      const a1 = (a === null || a === undefined) ? '' : a;
+      const b1 = (b === null || b === undefined) ? '' : b;
+      return a1 === b1;
+    },
+
+    // 로드된 캐릭터 데이터에서 null을 빈 문자열로 변환 (UI 표시용)
+    normalizeCharacterData(data) {
+      const result = { ...data };
+      const simpleFields = [
+        'name', 'systemPrompt', 'description', 'age', 'gender', 'mbti',
+        'characterType', 'originalTitle', 'originalLink', 'speechPattern',
+        'speechStyle', 'appearance', 'imageUrl'
+      ];
+      simpleFields.forEach(f => {
+        if (result[f] == null) result[f] = '';
+      });
+      return result;
+    },
+
     // 변경된 필드만 추출하는 함수
     getChangedFields() {
       if (!this.originalCharacter || !this.isEdit) {
@@ -1288,11 +1309,11 @@ export default {
           age: this.character.age,
           gender: this.character.gender,
           mbti: this.character.mbti,
-          type: this.character.type,
+          characterType: this.character.characterType,
           originalTitle: this.character.originalTitle,
           originalLink: this.character.originalLink,
           speechPattern: this.character.speechPattern,
-          speechStyle: this.character.conversationStyle,
+          speechStyle: this.character.speechStyle,
           appearance: this.character.appearance,
           tags: this.character.tags || [],
           hobbies: this.character.hobbies || [],
@@ -1313,26 +1334,21 @@ export default {
 
       // 기본 필드 비교
       const simpleFields = [
-        'name', 'description', 'age', 'gender', 'mbti', 'type', 'originalTitle', 'originalLink',
-        'speechPattern', 'isActive'
+        'name', 'description', 'age', 'gender', 'mbti', 'characterType', 'originalTitle', 'originalLink',
+        'speechPattern', 'speechStyle', 'isActive'
       ];
 
       simpleFields.forEach(field => {
-        if (this.character[field] !== this.originalCharacter[field]) {
+        if (!this.areEqualConsideringBlankNull(this.character[field], this.originalCharacter[field])) {
           changedFields[field] = this.character[field];
         }
       });
 
-      // 특수 필드 매핑 처리 (conversationStyle은 API에서 speechStyle로 사용됨)
-      if (this.character.conversationStyle !== this.originalCharacter.conversationStyle) {
-        changedFields.speechStyle = this.character.conversationStyle;
-      }
-
-      if (this.character.systemPrompt !== this.originalCharacter.systemPrompt) {
+      if (!this.areEqualConsideringBlankNull(this.character.systemPrompt, this.originalCharacter.systemPrompt)) {
         changedFields.systemPrompt = this.character.systemPrompt;
       }
 
-      if (this.character.appearance !== this.originalCharacter.appearance) {
+      if (!this.areEqualConsideringBlankNull(this.character.appearance, this.originalCharacter.appearance)) {
         changedFields.appearance = this.character.appearance;
       }
 
@@ -1377,16 +1393,17 @@ export default {
         const response = await getCharacter(id);
 
         // API 응답에서 캐릭터 정보 설정
-        if (response && response.success === true && response.data) {
-          const data = response.data;
+        if (response && response.status === 200 && response.data.success === true) {
+          const data = response.data.data;
 
           // 원본 데이터 저장 (깊은 복사)
           this.originalCharacter = JSON.parse(JSON.stringify(data));
 
-          // 기본 데이터 설정
+          // 기본 데이터 설정 (null 값을 UI 표시를 위해 빈 문자열로 변환)
+          const normalized = this.normalizeCharacterData(data);
           this.character = {
             ...this.character, // 기본 구조 유지
-            ...data,  // API 응답 데이터로 덮어쓰기
+            ...normalized,  // API 응답 데이터(정규화)로 덮어쓰기
             image: null        // 파일 입력은 초기화
           };
 
@@ -1444,11 +1461,11 @@ export default {
           response = await createCharacter(characterWithoutId);
         }
 
-        if (response && response.success === true && response.data) {
-          this.notifySuccess(this.isEdit ? '캐릭터가 수정되었습니다.' : '캐릭터가 등록되었습니다.');
-          this.goBack();
+        if (response && response.status === 200 && response.data && response.data.success === true) {
+            this.notifySuccess(this.isEdit ? '캐릭터가 수정되었습니다.' : '캐릭터가 등록되었습니다.');
+            this.goBack();
         } else {
-          this.notifyError('응답 데이터가 없습니다.');
+          this.notifyError('알 수 없는 오류가 발생했습니다. 다시 시도해 주세요.');
         }
       } catch (e) {
         console.error('캐릭터 저장 오류:', e);
diff --git a/src/views/Chat/CharacterList.vue b/src/views/Chat/CharacterList.vue
index 043db06..93136eb 100644
--- a/src/views/Chat/CharacterList.vue
+++ b/src/views/Chat/CharacterList.vue
@@ -380,14 +380,18 @@ export default {
       try {
         const response = await getCharacterList(this.page);
 
-        if (response && response.data) {
-          const data = response.data;
-          this.characters = data.content || [];
+        if (response && response.status === 200) {
+          if (response.data.success === true) {
+            const data = response.data.data;
+            this.characters = data.content || [];
 
-          const total_page = Math.ceil((data.totalCount || 0) / 20);
-          this.total_page = total_page <= 0 ? 1 : total_page;
+            const total_page = Math.ceil((data.totalCount || 0) / 20);
+            this.total_page = total_page <= 0 ? 1 : total_page;
+          } else {
+            this.notifyError('응답 데이터가 없습니다.');
+          }
         } else {
-          this.notifyError('응답 데이터가 없습니다.');
+          this.notifyError('알 수 없는 오류가 발생했습니다. 다시 시도해 주세요.');
         }
       } catch (e) {
         console.error('캐릭터 목록 조회 오류:', e);
@@ -412,8 +416,8 @@ export default {
         try {
           const response = await searchCharacters(this.search_word, this.page);
 
-          if (response && response.data) {
-            const data = response.data;
+          if (response && response.status === 200 && response.data && response.data.success === true) {
+            const data = response.data.data;
             this.characters = data.content || [];
 
             const total_page = Math.ceil((data.totalCount || 0) / 20);