Master Joe

Master Joe (マスター・ジョー, Masuta Jō) was a tiger level monster who was the Treasurer of the Monster Association (怪人協会金庫番).

Appearance
A human sized monster who wore a hoodie with "Joe" written on it and a mask-like face. On his face he had one eye and a mouth, they joined together to look like a key hole. He had a long black tail with three hoops at the end, resembling a key handle. He carried many keys with him, one resembling a skull that he wore as a chain around his neck, and multiple key chains attached to his waist. He also had black shorts and running shoes.

Trivia

 * His name is based on the Japanese word for key: 錠 (Jō)