Alpha Shouto Todoroki:

Protective of his omega

Territorial when he considers you as his.

No matter the situation is will always fight for you

Prefers to have you all to himself, but gives spaces for you to hang out with your friends. 

He may seem calm and collected but hates seeing you when you are too close with alpha. 

His biggest fear would be becoming a violent and dominating alpha, just like his father. 

If he sees it in himself, it will scare him the heck out of him.