Tomura and Tenko

Tomura was a slim man with pale skin, tinged yellow teeth, and a great deal of wrinkles around his eyes from scraping at allergies that irritated the surrounding skin since his childhood. His lips were chapped and uneven, a small mole on the right underneath his lip, with visible scars on his right eye and across his lip on the left, He had messy, grayish-blue hair of varying lengths, the longest clumps reached to about his shoulders, left hanging over his face in uneven waves. His eyes and mouth were normally obscured, but when visible, they were usually stretched wide in a rather maniacal manner, their bright red irises very small.

Tomura was initially perceived to be a "man-child": arrogant, selfish, dependent, and demanding, becoming irritated or downright angry if things didn't go according to plan and using video game terminology showing his detachment with reality and childish mentality. Unlike his mentor, Tomura lacked subtlety, preferring to eliminate problems through force. Much like a child, Tomura seemed unable to cope with his own feelings, instead lashing out and abusing both others or himself, clawing at his own neck when he became frustrated. A deep-seated hatred for hero society, a destructive desire to tear down civilization, and a deeply damaged psyche stemming from a tragic childhood and manipulation by All For One. While initially sadistic and nihilistic. Tomura was a very twisted, malevolent, and maliciously warped young man, who was considered to be the polar opposite of Izuku Midoriya. He didn't care for his or almost anyone else's life, having no qualms about performing evil deeds like murdering innocent people.[4][5] Tomura was initially perceived to be a "man-child": arrogant, selfish, dependent, and demanding, becoming irritated or downright angry if things didn't go according to plan and using video game terminology showing his detachment with reality and childish mentality. Unlike his mentor, Tomura lacked subtlety, preferring to eliminate problems through force. Much like a child, Tomura seemed unable to cope with his own feelings, instead lashing out and abusing both others or himself, clawing at his own neck when he became frustrated.

As a child, Tenko was shown to be relatively normal, even kind and compassionate. He held a great love for his family and a strong desire to become a hero someday, not unlike Izuku. However, the constant abuse he suffered from his hero-hating father made him psychologically fragile, being terrified of his mere presence. Because of this oppressive upbringing and the inaction from the rest of his family, Tenko felt that his whole family never truly supported him and believed that the house he grew up in masked rejection with kindness, becoming increasingly frustrated when the abuse grew worse. Eventually, Tenko's Quirk manifested for the first time and the boy finally snapped, destroying his household and all his family members. He was a kind and compassionate child who loved heroes and dreamed of becoming one himself, but trauma from his abusive father and the accidental death of his family led him to develop a deep hatred for hero society and a destructive personality. He was manipulative, lonely, and felt abandoned by heroes, which All For One exploited to turn him into a villain.

He had gray eyes and black hair as a child originally but, that changed when his Quirk, Decay first manifested according from stress and trauma from his abusive, hero hating father.