Tamaki Amajiki

Tamaki Amajiki (天喰 環) is a third-year student at U.A. High and is part of The Big Three.

Appearance
Tamaki has dark, messy hair and pointy ears, and is often seen slouching. He wears the standard school uniform of U.A., but in a slovenly way.

His hero costume consists of a dark body armor with shoulder guards and a carrier vest over it. He wears a mask over his eyes, a removable mouth mask and a cape with a hood.

Personality
Tamaki has a weak mentality. He gets anxious when speaking to a large audience, and will face away and lean into a wall if he is unable to keep going.

He seems to be rather socially awkward, as well as lack much confidence in his own abilities. It is said that while his physical abilities are above a professional Heroes level, and that his Quirk is extremely powerful, his mentality holds him back. He seems to also be rather sensitive, even to the point of becoming upset when a thug he is fighting insults him. He also seeks for confirmation when he had done a task, such as incapacitating a thug, indicating that he cannot recognise his own achievements. Tamaki also has some sort of victim complex, as he mistook praise from Fatgum as being taunted.

Quirk and Abilities
As a member U.A.'s Big Three, it is possible he is incredibly powerful. According to Fatgum, Tamaki's ability alone can outclass most pro heroes.

Manifest: Using his body, he can manifest the characteristics of the things he eats. He can make multiple transformations at once. It is unknown if this only applies to living things, or what he can eat in general. However, this Quirk appears to have its limits as he has to eat the power he wants to use everyday. The proficiency of his abilities depend on how much he eats, an example is his octopus fingers that appear more powerful the more takoyaki he eats. He also appears to be able to combine his manifestations.

Mirio Togata
Tamaki seems to have known Mirio for a long time, saying Mirio had been strong since childhood, and are on a first name basis with each other, indicating a level of closeness.

He was surprised at the sight of Mirio's sadden state after learning of Eri's situation, and Mirio showing visible concern after learning about the injury Tamaki received, asking very swiftly if he was okay.

Tamaki admires Mirio. He praised the techniques Mirio achieved from the hardships he went through. He told Kirishima he shines like the sun similarly to Mirio, something Tamaki himself feels a lack of confidence to achieve.

Mirio also admires Tamaki to some unknown degree, as seen in a flashback, Mirio commented he was able to give it his all because of his presence. This reciprocating admiration and his own admiration for Mirio's personality is a strong motivation for Tamaki to gather his assurance and courage to fight.

Nejire Hado
While they are not on a first name basis, the two have known each other during their time at U.A, and thus appear to be somewhat close. Nejire showed no visible sign of worry when discovering Tamaki had been injured in comparison to Mirio, the reason for this is unknown.

Fatgum
Fatgum scouted Tamaki to work for his office. Fatgum sees a lot of promise in Tamaki but constantly teases and demands Tamaki to make some change to his cruddy mentality.

Tamaki does not like Fatgum's teasing, claiming Fatgum only scouted him to torment him in what Tamaki calls 'workplace harassment'.

Since Fatgum is shown to be a man who eats a lot, this seems to complement with the requirements of Tamaki's Quirk.

Eijiro Kirishima
Tamaki is somewhat annoyed by Eijiro's optimism, but at the same time compliments him for it. Eijiro has a lot of respect for Tamaki, due to him being his senior.

Trivia

 * His name contains the kanji for heaven (天), eating (喰), and ring/hoop (環).