"I don't know about magic, but stuff like that isn't a fluke in my world. It's hard at first, but you keep trying, and then before you know it, you're improving at a rate you can't keep up with!" His optimism would be grating, except he came from a place of starting with zero prospects. His progress was bought with blood, sweat, and tears.

"I see..." he muttered, looking very intense as the gears were turning. His hands were unconsciously miming writing in a notebook again. Nerd. "But, that's fine. I know what I have to do. I use visualization exercises to imagine drawing out just the right amount of power from my Quirk. I can apply the same concept here. Where can I find a comprehensive list of blood types, their characteristics, and their powers?"