Honkai: Star Rail - Hot Blooded Achievement Guide It might seem impossible to prevent getting frozen whatsoever while fighting Cocolia, Mother of Deception, but doing this unlocks the Hot Blooded achievement.
Now there are a couple of secret achievements associated with Cocolia, leader of Belobog in Honkai: Star Rail Accounts. But, nearly all these achievements relate to fighting her in her own human form, not in her own Fragmentum...