Board Thread:General Discussion/@comment-24319911-20160701130131/@comment-2601:248:4402:2890:B9DF:D5A9:A710:3313-20171001061517

Blast is most likely Saitama. Black spiky hair = Saitama before he went bald. Something happened to him that took his hair, his original costume, AND HIS MEMORY. This is why he can't properly explain his power - because he doesn't remember. But he is still himself, so he's still a "hero for fun", still wears a cape, etc. That's also why Blast is "absent". And why no one has heard of this bald and amazingly strong person before. I mean, the Hero Association had been monitoring agents, right? One would think they'd have been doing the same to Saitama - but no. He apparently just appeared one day.

The description of Blast fighting monsters when Saitama was 7 is an error or a red herring. Or everything I said is wrong and Blast is Saitama's father or older brother, but I feel that's less likely. The one(s) responsible for Saitama's memory loss will be the ultimate enemy/challenge, not Blast.