what is up with todoroki's quirk, i mean it is two quirks in one. From what we know children inheret their parents quirks or some combination of them. Todoroki got both a fire and ice quirk because of this. However, he is the only person in the series who has anything like this. With the giant variety in quirks their must have been other people with vastly different quirks who got married, there is not one other quirk that i can think of in the series that basically operates as two quirks. I dont think there is probably a real answer for this, just thought it would be a good point of discussion, do you think the author has thought about this at all?