Why is Todoroki’s eye blue and grey?
Todoroki’s one eye is blue and the other is grey. Similar to his quirk and hair, it is mixed. Many have been asking this question for a while now, hence decided to explore the topic a bit further.
Todoroki’s eye color mismatch is there from birth. It is a rare genetic condition referred to as Heterochromia and in fact is quite possible in the real world.
Shoto Todoroki simply possesses that minor bit of genetics that causes his eyes to possess two differing pigments, in this case blue and grey. It has nothing to do with him being burned as a child or any sort of ‘half-blindness’. It’s just genetics.