Board Thread:Questions and Answers/@comment-30751547-20170207174415/@comment-41.200.180.17-20170303102518

2 possibilities about Blast:

He's not real, Tatsumaki's imaginary hero and the HA gave him rank 1 because she told them to do so.

He's dead.

even if he was around there is no way he'll end up being stonger than Tatsumaki.