Board Thread:Questions and Answers/@comment-30751547-20170207174415/@comment-105.105.97.155-20170225183440

i dont think blast really exists, hear me out.

Only person who has witnessed Blast (that we know of) is Tatsumaki when she was a kid. Other than that, he isnt talked about at all by the HA or anyone else in the S class other than people wanting to finally meet him. In short, the only confirmed person to have even seen Blast, is Tatsumaki.

I think that given the circumstances of Blasts appearance during Tatsumaki's flashbacks... he was imagined by Tatsumaki to create a goal that she could strive for. To be a hero that doesn't have to rely on anyone. Blast is the idealized hero that exists in Tatsumaki's mind and nothing more.

If that was true, Blast could be registered into the HA by the authority of Tatsumaki alone. She's the head of the S-Class. If i was the head of the HA and someone like Tatsumaki assured me that there was someone way stronger than herself named Blast that no one has met except me... I'd listen. No questions asked.

tl;dr My theory is that Tatsumaki created Blast and registered 'him' by her unquestionable authority as a powerful hero.