User blog comment:IiSxnflxower/Dabi is Toya Todoroki (Theory)/@comment-46001480-20200605054658

I agree but some more evidence is also about his quirk and appearance. With his quirk he had a very powerful unknamed fire quirk. As we know when fire gets really hot it can be blue. It is said that he inherited his moms weak constitution aka he had a frail body. From what I have researched aparently in the manga Dabi said Dabi's flames hurt him, and Dabi later expands on this, saying that his fire affects him most of all. So his scars or the purple part of his skin could be from the accident and/or so he doesn't harm himself with his quirk. Last but if you look up a picture of dabi and Toya just look how similare their eye shapes are.