diff --git a/konabot/plugins/celeste_classic/__init__.py b/konabot/plugins/celeste_classic/__init__.py
index 2713405..c00ae89 100644
--- a/konabot/plugins/celeste_classic/__init__.py
+++ b/konabot/plugins/celeste_classic/__init__.py
@@ -1,6 +1,7 @@
 from pathlib import Path
 import subprocess
 import tempfile
+from typing import Any
 from loguru import logger
 from nonebot import on_command
 from pydantic import BaseModel
@@ -41,7 +42,12 @@ class CelesteStatus(BaseModel):
 celeste_status = DataManager(CelesteStatus, DATA_PATH / "celeste-status.json")
 
 
-cmd = on_command(cmd="celeste", aliases={"蔚蓝", "爬山", "鳌太线"})
+# ↓ 这里的 Type Hinting 是为了能 fit 进去 set[str | tuple[str, ...]]
+aliases: set[Any] = {"蔚蓝", "爬山", "鳌太线"}
+ALLOW_CHARS = "wasdxc0123456789 \t\n\r"
+
+
+cmd = on_command(cmd="celeste", aliases=aliases)
 
 
 @cmd.handle()
@@ -57,11 +63,13 @@ async def _(msg: UniMsg, evt: Event, bot: Bot):
                     prev = f"QQ:{bot.self_id}:" + str(msgid)
 
     actions = msg.extract_plain_text().strip().removeprefix("celeste")
-    for alias in {"蔚蓝", "爬山", "鳌太线"}:
+    for alias in aliases:
         actions = actions.removeprefix(alias)
     actions = actions.strip()
     if len(actions) == 0:
         return
+    if any((c not in ALLOW_CHARS) for c in actions):
+        return
 
     if prev is not None:
         async with celeste_status.get_data() as data: