Dorohedoro (Japanese: ドロヘドロ) is a Japanese anime and manga series.

Caiman (カイマン, Kaiman), or the Magician Killer, is the main protagonist of Dorohedoro. He is a human born in the Hole with an immunity towards magic. He has made it explicitly clear that "Kaiman" was not his actual name, but was given to him by Nikaido after he began suffering from amnesia. His lizard head being the result of a Magic User's curse, his main goal is to seek out the one who cursed him in order to change him back. But, because he can't remember who cursed him, due to his amnesia, Kaiman resorts to clamping his mouth around the head of every Magic User he comes across. He lets them see the "little man" in the back of his head before pulling them back out so he can ask them all the same question: "What did the guy inside my head say?"