diff --git a/server/internal/questflow/rewards.go b/server/internal/questflow/rewards.go
index 8c7734c..6d9ab90 100644
--- a/server/internal/questflow/rewards.go
+++ b/server/internal/questflow/rewards.go
@@ -166,6 +166,10 @@ func (h *QuestHandler) applyExpRewards(user *store.UserState, questId int32, now
 		return
 	}
 
+	if questDef.CharacterExp == 0 && questDef.CostumeExp == 0 {
+		return
+	}
+
 	deckCostumeUuids, deckCharacterIds := h.resolveDeckUnits(user, questId)
 	if deckCostumeUuids == nil {
 		log.Printf("[applyExpRewards] questId=%d skipping character/costume exp (deck not resolved)", questId)
diff --git a/server/internal/service/deck.go b/server/internal/service/deck.go
index 8187019..6212af9 100644
--- a/server/internal/service/deck.go
+++ b/server/internal/service/deck.go
@@ -191,11 +191,45 @@ func (s *DeckServiceServer) ReplaceTripleDeck(ctx context.Context, req *pb.Repla
 			}
 			store.ApplyDeckReplacement(user, model.DeckType(detail.DeckType), detail.UserDeckNumber, deckSlotsFromProto(detail.Deck), nowMillis)
 		}
+
+		key := store.DeckKey{DeckType: model.DeckType(req.DeckType), UserDeckNumber: req.UserDeckNumber}
+		td := user.TripleDecks[key]
+		td.DeckType = model.DeckType(req.DeckType)
+		td.UserDeckNumber = req.UserDeckNumber
+		td.DeckNumber01 = innerDeckNumber(req.DeckDetail01)
+		td.DeckNumber02 = innerDeckNumber(req.DeckDetail02)
+		td.DeckNumber03 = innerDeckNumber(req.DeckDetail03)
+		td.LatestVersion = nowMillis
+		user.TripleDecks[key] = td
 	})
 
 	return &pb.ReplaceTripleDeckResponse{}, nil
 }
 
+func innerDeckNumber(d *pb.DeckDetail) int32 {
+	if d == nil {
+		return 0
+	}
+	return d.UserDeckNumber
+}
+
+func (s *DeckServiceServer) UpdateTripleDeckName(ctx context.Context, req *pb.UpdateTripleDeckNameRequest) (*pb.UpdateTripleDeckNameResponse, error) {
+	log.Printf("[DeckService] UpdateTripleDeckName: deckType=%d deckNumber=%d name=%q", req.DeckType, req.UserDeckNumber, req.Name)
+	userId := CurrentUserId(ctx, s.users, s.sessions)
+
+	s.users.UpdateUser(userId, func(user *store.UserState) {
+		key := store.DeckKey{DeckType: model.DeckType(req.DeckType), UserDeckNumber: req.UserDeckNumber}
+		td := user.TripleDecks[key]
+		td.DeckType = model.DeckType(req.DeckType)
+		td.UserDeckNumber = req.UserDeckNumber
+		td.Name = req.Name
+		td.LatestVersion = gametime.NowMillis()
+		user.TripleDecks[key] = td
+	})
+
+	return &pb.UpdateTripleDeckNameResponse{}, nil
+}
+
 func (s *DeckServiceServer) ReplaceMultiDeck(ctx context.Context, req *pb.ReplaceMultiDeckRequest) (*pb.ReplaceMultiDeckResponse, error) {
 	log.Printf("[DeckService] ReplaceMultiDeck: %d entries", len(req.DeckDetail))
 	userId := CurrentUserId(ctx, s.users, s.sessions)
diff --git a/server/internal/store/clone.go b/server/internal/store/clone.go
index 4c3f7e3..7015425 100644
--- a/server/internal/store/clone.go
+++ b/server/internal/store/clone.go
@@ -14,6 +14,7 @@ func CloneUserState(u UserState) UserState {
 	out.DeckSubWeapons = cloneSliceMap(u.DeckSubWeapons)
 	out.DeckParts = cloneSliceMap(u.DeckParts)
 	out.Decks = maps.Clone(u.Decks)
+	out.TripleDecks = maps.Clone(u.TripleDecks)
 	out.Quests = maps.Clone(u.Quests)
 	out.QuestMissions = maps.Clone(u.QuestMissions)
 	out.WeaponStories = maps.Clone(u.WeaponStories)
diff --git a/server/internal/store/seed.go b/server/internal/store/seed.go
index feafd7e..dfc6615 100644
--- a/server/internal/store/seed.go
+++ b/server/internal/store/seed.go
@@ -97,6 +97,7 @@ func SeedUserState(userId int64, uuid string, nowMillis int64, platform model.Cl
 		Companions:               make(map[string]CompanionState),
 		DeckCharacters:           make(map[string]DeckCharacterState),
 		Decks:                    make(map[DeckKey]DeckState),
+		TripleDecks:              make(map[DeckKey]TripleDeckState),
 		DeckSubWeapons:           make(map[string][]string),
 		DeckParts:                make(map[string][]string),
 		Quests:                   make(map[int32]UserQuestState),
diff --git a/server/internal/store/sqlite/load.go b/server/internal/store/sqlite/load.go
index 8a193bf..35291b7 100644
--- a/server/internal/store/sqlite/load.go
+++ b/server/internal/store/sqlite/load.go
@@ -43,6 +43,7 @@ func initMaps(u *store.UserState) {
 	u.Thoughts = make(map[string]store.ThoughtState)
 	u.DeckCharacters = make(map[string]store.DeckCharacterState)
 	u.Decks = make(map[store.DeckKey]store.DeckState)
+	u.TripleDecks = make(map[store.DeckKey]store.TripleDeckState)
 	u.DeckSubWeapons = make(map[string][]string)
 	u.DeckParts = make(map[string][]string)
 	u.Quests = make(map[int32]store.UserQuestState)
@@ -299,6 +300,16 @@ func loadMapTables(db *sql.DB, uid int64, u *store.UserState) {
 			u.Decks[store.DeckKey{DeckType: v.DeckType, UserDeckNumber: v.UserDeckNumber}] = v
 		})
 
+	queryRows(db, `SELECT deck_type, user_deck_number, name, deck_number01, deck_number02, deck_number03, latest_version
+		FROM user_triple_decks WHERE user_id=?`, uid,
+		func(rows *sql.Rows) {
+			var v store.TripleDeckState
+			var dt int32
+			rows.Scan(&dt, &v.UserDeckNumber, &v.Name, &v.DeckNumber01, &v.DeckNumber02, &v.DeckNumber03, &v.LatestVersion)
+			v.DeckType = model.DeckType(dt)
+			u.TripleDecks[store.DeckKey{DeckType: v.DeckType, UserDeckNumber: v.UserDeckNumber}] = v
+		})
+
 	queryRows(db, `SELECT user_deck_character_uuid, ordinal, user_weapon_uuid
 		FROM user_deck_sub_weapons WHERE user_id=? ORDER BY user_deck_character_uuid, ordinal`, uid,
 		func(rows *sql.Rows) {
diff --git a/server/internal/store/sqlite/save.go b/server/internal/store/sqlite/save.go
index 3617e63..c4d3e82 100644
--- a/server/internal/store/sqlite/save.go
+++ b/server/internal/store/sqlite/save.go
@@ -171,6 +171,12 @@ func writeUserState(tx *sql.Tx, uid int64, u *store.UserState) error {
 			return err
 		}
 	}
+	for k, v := range u.TripleDecks {
+		if err := exec(`INSERT INTO user_triple_decks (user_id, deck_type, user_deck_number, name, deck_number01, deck_number02, deck_number03, latest_version) VALUES (?,?,?,?,?,?,?,?)`,
+			uid, int32(k.DeckType), k.UserDeckNumber, v.Name, v.DeckNumber01, v.DeckNumber02, v.DeckNumber03, v.LatestVersion); err != nil {
+			return err
+		}
+	}
 	for key, uuids := range u.DeckSubWeapons {
 		for i, uuid := range uuids {
 			if err := exec(`INSERT INTO user_deck_sub_weapons (user_id, user_deck_character_uuid, ordinal, user_weapon_uuid) VALUES (?,?,?,?)`,
@@ -713,6 +719,18 @@ func diffAndSave(tx *sql.Tx, uid int64, before, after *store.UserState) error {
 		}
 	}
 
+	for k, v := range after.TripleDecks {
+		if old, ok := before.TripleDecks[k]; !ok || old != v {
+			exec(`INSERT OR REPLACE INTO user_triple_decks (user_id, deck_type, user_deck_number, name, deck_number01, deck_number02, deck_number03, latest_version) VALUES (?,?,?,?,?,?,?,?)`,
+				uid, int32(k.DeckType), k.UserDeckNumber, v.Name, v.DeckNumber01, v.DeckNumber02, v.DeckNumber03, v.LatestVersion)
+		}
+	}
+	for k := range before.TripleDecks {
+		if _, ok := after.TripleDecks[k]; !ok {
+			exec(`DELETE FROM user_triple_decks WHERE user_id=? AND deck_type=? AND user_deck_number=?`, uid, int32(k.DeckType), k.UserDeckNumber)
+		}
+	}
+
 	replaceSliceTable(tx, uid, "user_deck_sub_weapons", after.DeckSubWeapons, func(key string, uuids []string) {
 		for i, uuid := range uuids {
 			exec(`INSERT INTO user_deck_sub_weapons (user_id, user_deck_character_uuid, ordinal, user_weapon_uuid) VALUES (?,?,?,?)`, uid, key, i, uuid)
diff --git a/server/internal/store/types.go b/server/internal/store/types.go
index 2726906..7f04628 100644
--- a/server/internal/store/types.go
+++ b/server/internal/store/types.go
@@ -70,6 +70,7 @@ type UserState struct {
 	Thoughts              map[string]ThoughtState
 	DeckCharacters        map[string]DeckCharacterState
 	Decks                 map[DeckKey]DeckState
+	TripleDecks           map[DeckKey]TripleDeckState
 	Quests                map[int32]UserQuestState
 	QuestMissions         map[QuestMissionKey]UserQuestMissionState
 	Missions              map[int32]UserMissionState
@@ -142,6 +143,9 @@ func (u *UserState) EnsureMaps() {
 	if u.Decks == nil {
 		u.Decks = make(map[DeckKey]DeckState)
 	}
+	if u.TripleDecks == nil {
+		u.TripleDecks = make(map[DeckKey]TripleDeckState)
+	}
 	if u.DeckSubWeapons == nil {
 		u.DeckSubWeapons = make(map[string][]string)
 	}
@@ -455,6 +459,16 @@ type DeckState struct {
 	LatestVersion           int64
 }
 
+type TripleDeckState struct {
+	DeckType       model.DeckType
+	UserDeckNumber int32
+	Name           string
+	DeckNumber01   int32
+	DeckNumber02   int32
+	DeckNumber03   int32
+	LatestVersion  int64
+}
+
 type DeckCharacterInput struct {
 	UserCostumeUuid    string
 	MainUserWeaponUuid string
diff --git a/server/internal/userdata/changed_tables.go b/server/internal/userdata/changed_tables.go
index 85a9609..700661f 100644
--- a/server/internal/userdata/changed_tables.go
+++ b/server/internal/userdata/changed_tables.go
@@ -188,6 +188,9 @@ func ChangedTables(before, after *store.UserState) []string {
 	if !mapsEqualStruct(before.Decks, after.Decks) {
 		add("IUserDeck")
 	}
+	if !mapsEqualStruct(before.TripleDecks, after.TripleDecks) {
+		add("IUserTripleDeck")
+	}
 	if !mapsEqualSliceValues(before.DeckSubWeapons, after.DeckSubWeapons) {
 		add("IUserDeckSubWeaponGroup")
 	}
@@ -358,6 +361,8 @@ func keyFieldsForTable(table string) []string {
 		return []string{"userId", "userDeckCharacterUuid"}
 	case "IUserDeck":
 		return []string{"userId", "deckType", "userDeckNumber"}
+	case "IUserTripleDeck":
+		return []string{"userId", "deckType", "userDeckNumber"}
 	case "IUserDeckSubWeaponGroup":
 		return []string{"userId", "userDeckCharacterUuid", "sortOrder"}
 	case "IUserDeckPartsGroup":
diff --git a/server/internal/userdata/proj_deck.go b/server/internal/userdata/proj_deck.go
index 1b9f535..5431d2f 100644
--- a/server/internal/userdata/proj_deck.go
+++ b/server/internal/userdata/proj_deck.go
@@ -13,6 +13,10 @@ func init() {
 		s, _ := utils.EncodeJSONMaps(sortedDeckRecords(user)...)
 		return s
 	})
+	register("IUserTripleDeck", func(user store.UserState) string {
+		s, _ := utils.EncodeJSONMaps(sortedTripleDeckRecords(user)...)
+		return s
+	})
 	register("IUserDeckCharacter", func(user store.UserState) string {
 		s, _ := utils.EncodeJSONMaps(sortedDeckCharacterRecords(user)...)
 		return s
@@ -68,6 +72,35 @@ func sortedDeckRecords(user store.UserState) []map[string]any {
 	return records
 }
 
+func sortedTripleDeckRecords(user store.UserState) []map[string]any {
+	keys := make([]store.DeckKey, 0, len(user.TripleDecks))
+	for key := range user.TripleDecks {
+		keys = append(keys, key)
+	}
+	sort.Slice(keys, func(i, j int) bool {
+		if keys[i].DeckType != keys[j].DeckType {
+			return keys[i].DeckType < keys[j].DeckType
+		}
+		return keys[i].UserDeckNumber < keys[j].UserDeckNumber
+	})
+
+	records := make([]map[string]any, 0, len(keys))
+	for _, key := range keys {
+		row := user.TripleDecks[key]
+		records = append(records, map[string]any{
+			"userId":         user.UserId,
+			"deckType":       int32(row.DeckType),
+			"userDeckNumber": row.UserDeckNumber,
+			"name":           row.Name,
+			"deckNumber01":   row.DeckNumber01,
+			"deckNumber02":   row.DeckNumber02,
+			"deckNumber03":   row.DeckNumber03,
+			"latestVersion":  row.LatestVersion,
+		})
+	}
+	return records
+}
+
 func sortedDeckCharacterRecords(user store.UserState) []map[string]any {
 	keys := sortedStringKeys(user.DeckCharacters)
 	records := make([]map[string]any, 0, len(keys))
diff --git a/server/internal/userdata/state_projection.go b/server/internal/userdata/state_projection.go
index 980b3b7..d398769 100644
--- a/server/internal/userdata/state_projection.go
+++ b/server/internal/userdata/state_projection.go
@@ -21,6 +21,7 @@ func FullClientTableMap(user store.UserState) map[string]string {
 		"IUserThought":                            projectTable("IUserThought", user),
 		"IUserDeckCharacter":                      projectTable("IUserDeckCharacter", user),
 		"IUserDeck":                               projectTable("IUserDeck", user),
+		"IUserTripleDeck":                         projectTable("IUserTripleDeck", user),
 		"IUserLogin":                              projectTable("IUserLogin", user),
 		"IUserLoginBonus":                         projectTable("IUserLoginBonus", user),
 		"IUserMission":                            projectTable("IUserMission", user),
diff --git a/server/migrations/20260514064857_add_user_triple_decks.sql b/server/migrations/20260514064857_add_user_triple_decks.sql
new file mode 100644
index 0000000..c75019a
--- /dev/null
+++ b/server/migrations/20260514064857_add_user_triple_decks.sql
@@ -0,0 +1,20 @@
+-- +goose Up
+CREATE TABLE user_triple_decks (
+    user_id          INTEGER NOT NULL REFERENCES users(user_id),
+    deck_type        INTEGER NOT NULL,
+    user_deck_number INTEGER NOT NULL,
+    name             TEXT    NOT NULL DEFAULT '',
+    deck_number01    INTEGER NOT NULL DEFAULT 0,
+    deck_number02    INTEGER NOT NULL DEFAULT 0,
+    deck_number03    INTEGER NOT NULL DEFAULT 0,
+    latest_version   INTEGER NOT NULL DEFAULT 0,
+    PRIMARY KEY (user_id, deck_type, user_deck_number)
+);
+
+-- Legacy BigHunt wave-decks have no preset wrapper rows and aren't reachable
+-- via the new IUserTripleDeck projection. Drop them so users start clean and
+-- repopulate via ReplaceTripleDeck from the client.
+DELETE FROM user_decks WHERE deck_type = 5;
+
+-- +goose Down
+DROP TABLE IF EXISTS user_triple_decks;