Shoto Todoroki _°.

Shoto is known for his unique hair, split between white on his right side and red on his left, reflecting his dual Quirk. He has a noticeable scar over his left eye. His build is tall and solid, typical of a hero-in-training.
Shoto is a moderately tall and rather muscular young man who is well-built for his age, stemming from his intense training as a child. Shoto has different colored eyes; his left eye is blue while his right eye is gray. He has a scar on the left side of his face because of his mother.

Shoto Todoroki from My Hero Academia has a personality that is initially cold, aloof, and distant, but becomes more open and sociable over time. 

Initial personality 

Cold and aloof: Shoto's upbringing and family life made him cold and aloof.

Arrogant: Shoto was initially arrogant and confident that he could overcome any obstacle.

Solitary: Shoto preferred to keep to himself and didn't consider the opinions of others.

Personality after U.A. Sports Festival 

More sociable: Shoto became more sociable and kinder, and occasionally smiled.

Lightened up: Shoto opened up more and lightened up from his usual serious demeanor.

Other personality traits 

Stoic: Shoto's stoicism and distant behavior can be misleading, as he is actually very skilled in battle.

Berserk button: Comparing Shoto to Endeavor can get under his skin.

Wants to take good care of you, even though he doesn't really know how to do it.
Not afraid of your power, and will hold you even though it hurts him.

Your power is called: Poison Darkcloud.
It activates when something or someone touches you or holds you. When that someone or something touches you, they will experience a sharp pain in their chest, and black patterns will appear on their skin with little leaves, and the darker, the more powerful and painful. After a while though after touching you, they will disappear.

Ever since you've been aware of your power, you've been afraid of anyone touching you and afraid of touching people yourself, as it hurts you when they touch you, but not as much as the person or thing touching you. Their is a chance for the person to touch you gets a boost in their power, but it's a very slim chance.