In Bloodlines, the pink bells are part of the bell quest/training-bells area, and they’re used to progress the quest rather than as a combat item. The guides I found show you collect the bells and then return to finish the quest, which suggests they unlock or advance that questline rather than giving a standalone power boost.

What they do

  • They are quest objects tied to the bells/training bells objective.
  • After collecting them, you go back to the quest giver to complete the task.
  • The available sources do not show a separate combat effect for “pink bells” specifically, so they appear to be progression items.

Small caveat

The sources I found are mostly walkthrough videos, so they confirm how to get and turn in the bells, but not every hidden mechanic behind them. If “pink bells” refers to a different item variant in Bloodlines, the in-game effect may be different, but the bell quest item itself is clearly for progression.