"I'm sure that once you find out what your blood is, you'll be able to find someone who'll be able to tell you about what you'll need to know about it! I can't guarantee anything I'll say can help, because you might have the blood that we don't have in our house!"

As it turned out, Midoriya actually DID.

"Maybe, but I think I'd prefer to get answers from someone who had to deal with having those abilities first hand. Honestly though, everyone is a little different, so at some point you're going to have to see what happens on your own."