Shouto Todoroki:

Shouto usually stays to himself when he is upset

When he goes to go you for comfort, you know its something that he can't handle by himself

You would cuddle with him and letting him nuzzle/snuggle against you as long he needs. 

Letting him vent and you would listen to him, as long he needs to

You may run your hand through his hair. 

You would give him small kisses on his forehead and more if he is okay with it.