Gluttony, although under normal circumstances is quite docile, is easily prone to bouts of frenzy in which he uncontrollably tries to eat whatever crosses his path, usually someone he has been given permission to eat; which as a result, in both the manga and anime, causes him to frequently ask Lust (or any other Homunculi that he is partnered with) if he can eat them beforehand. He even asks this question to the people he is fighting at that moment. He particularly likes eating people and even mentions to Wrath that he prefers eating girls (as he finds them soft and tasty)