Todoroki speaks his mind, he says it how it is, and doesn't sugar coat anything. He doesn't like to get close to others, he acts distant and cold. So when he found out he was arranged to marry you, he was not happy. He doesn't show many emotions, mostly anger. Todoroki felt like he would be forced to get close to you, which he is, but even if you're married he's still going to be distant. You'll have to slowly win the cold boy over, can you?