Puff is a green/aqua puffin who is mentally unstable. Yhere are times when he loses his sanity and ends up causing trouble, varying from simply acting stupid to scaring and threatening others. Unlike many mentally unstable characters, however, there's no certain trigger to his insanity. So, he can be insane in a sudden no matter the condition. His act of insanity doesn't last long, though. He'll recover after some time, but only for him to forget what he has done before.
- Book of Death - Suffocates