diff --git a/server/status/charactor_status/base.py b/server/status/charactor_status/base.py
index 423af4f7..7885cee0 100644
--- a/server/status/charactor_status/base.py
+++ b/server/status/charactor_status/base.py
@@ -1,4 +1,6 @@
 from typing import Any, Literal, List
+
+from ...modifiable_values import DamageDecreaseValue
 from ...consts import ObjectType
 from ..base import StatusBase
 from ...action import RemoveObjectAction, Actions
@@ -10,6 +12,11 @@ class CharactorStatusBase(StatusBase):
     Base class of charactor status.
     """
     type: Literal[ObjectType.CHARACTOR_STATUS] = ObjectType.CHARACTOR_STATUS
+    name: str
+    desc: str
+    version: str
+    usage: int
+    max_usage: int
 
 
 class UsageCharactorStatus(CharactorStatusBase):
@@ -26,7 +33,11 @@ class UsageCharactorStatus(CharactorStatusBase):
     If it is not a damage related status, check_remove_triggered should be
     called manually.
     """
-    name: Literal['UsageCharactorStatus'] = 'UsageCharactorStatus'
+    name: str
+    desc: str
+    version: str
+    usage: int
+    max_usage: int
 
     def check_should_remove(self) -> List[Actions]:
         """
@@ -55,8 +66,11 @@ class RoundCharactorStatus(CharactorStatusBase):
     event trigger on ROUND_PREPARE to check if run out of usages; when run out
     of usages, it will remove itself.
     """
-    name: Literal['RoundCharactorStatus'] = 'RoundCharactorStatus'
+    name: str
+    desc: str
+    version: str
     usage: int
+    max_usage: int
 
     def check_should_remove(self) -> List[RemoveObjectAction]:
         """
@@ -79,3 +93,55 @@ def event_handler_ROUND_PREPARE(
         """
         self.usage -= 1
         return list(self.check_should_remove())
+
+
+class DefendCharactorStatus(UsageCharactorStatus):
+    """
+    Base class of defend status (purple shield), decrease damage with its rule
+    when receive damage, and decrease usage by 1.
+    """
+    name: str
+    desc: str
+    version: str
+    usage: int
+    max_usage: int
+    min_damage_to_trigger: int
+    max_in_one_time: int
+    decrease_usage_by_damage: bool = False
+
+    def value_modifier_DAMAGE_DECREASE(
+            self, value: DamageDecreaseValue, match: Any,
+            mode: Literal['TEST', 'REAL']) -> DamageDecreaseValue:
+        """
+        Decrease damage with its rule, and decrease 1 usage.
+        """
+        if not value.is_corresponding_charactor_receive_damage(
+            self.position, match,
+        ):
+            # not this charactor receive damage, not modify
+            return value
+        assert self.usage > 0
+        new_usage = value.apply_shield(
+            self.usage, self.min_damage_to_trigger, 
+            self.max_in_one_time, self.decrease_usage_by_damage,
+        )
+        assert mode == 'REAL'
+        self.usage = new_usage
+        return value
+
+
+class ShieldCharactorStatus(DefendCharactorStatus):
+    """
+    Base class of shield status (yellow shield), decrease damage by its usage
+    and decrease corresponding usage.
+    """
+    name: str
+    desc: str
+    version: str
+    usage: int
+    max_usage: int
+
+    # papams passing to apply_shield is fixed
+    min_damage_to_trigger: int = 0
+    max_in_one_time: int = 0
+    decrease_usage_by_damage: bool = True
diff --git a/server/status/charactor_status/foods.py b/server/status/charactor_status/foods.py
index c28b5fe7..54195b55 100644
--- a/server/status/charactor_status/foods.py
+++ b/server/status/charactor_status/foods.py
@@ -2,12 +2,12 @@
 
 from ...consts import SkillType
 
-from ...modifiable_values import DamageDecreaseValue, DamageIncreaseValue
+from ...modifiable_values import DamageIncreaseValue
 
 from ...action import RemoveObjectAction
 
 from ...event import MakeDamageEventArguments
-from .base import RoundCharactorStatus
+from .base import DefendCharactorStatus, RoundCharactorStatus
 
 
 class Satiated(RoundCharactorStatus):
@@ -59,7 +59,7 @@ def event_handler_MAKE_DAMAGE(
         return self.check_should_remove()
 
 
-class LotusFlowerCrisp(RoundCharactorStatus):
+class LotusFlowerCrisp(RoundCharactorStatus, DefendCharactorStatus):
     name: Literal['Lotus Flower Crisp']
     desc: str = (
         "During this Round, the target character takes -3 DMG the next time."
@@ -67,30 +67,8 @@ class LotusFlowerCrisp(RoundCharactorStatus):
     version: Literal['3.3'] = '3.3'
     usage: int = 1
     max_usage: int = 1
-
-    def value_modifier_DAMAGE_DECREASE(
-            self, value: DamageDecreaseValue, match: Any,
-            mode: Literal['TEST', 'REAL']) -> DamageDecreaseValue:
-        assert mode == 'REAL'
-        if not value.is_corresponding_charactor_receive_damage(
-            self.position, match
-        ):
-            # not this charactor receive damage, not modify
-            return value
-        if value.damage == 0:
-            # no damage, not modify
-            return value
-        assert self.usage > 0
-        decrease = min(3, value.damage)
-        value.damage -= decrease
-        assert mode == 'REAL'
-        self.usage -= 1
-        return value
-
-    def event_handler_MAKE_DAMAGE(
-        self, event: MakeDamageEventArguments, match: Any
-    ) -> List[RemoveObjectAction]:
-        return self.check_should_remove()
+    min_damage_to_trigger: int = 1
+    max_in_one_time: int = 3
 
 
 class TandooriRoastChicken(RoundCharactorStatus):