Mezo Shoji (障しょう子じ目め蔵ぞう Shōji Mezō?), also known as the Tentacle Hero: Tentacole (触手ヒーロー テンタコル Shokushu Hīrō Tentakoru?), is a student in Class 1-A at U.A. High School, training to become a Pro Hero.

Despite his frightening appearance, Mezo is a very friendly and gentle person who will work nicely with anyone. He is not the type to hold grudges, showing no ill will towards those that harm him unwillingly.

Mezo is quite selfless and willing to risk his life for a friend. He can be empathetic and understanding, but still shows a sense of maturity and responsibility that prevents himself from acting under emotional impulses, even if he feels regretful about it. It is evident that he is very protective of his fellow classmates, especially if they are hurt or injured.

Mezo claims to hold no desire for material needs, being fine with having few possessions of his own. This is a trait he has been carrying since childhood.