I never have too many thoughts on top/bottom because I feel like most if not all chars are versatile
but I think Todoroki is super nice in bed. Very quiet and intense. An absolute service top or a quiet bottom that thrives on gentle touches but not so much on praise. Praise will for him always be this hate/love relationship where he absolutely craves it but also never thinks he’s worth it.
I feel like his biggest most secret (though not secret at all tbh) kinks would be daddy/mommy kink.