Muichiro Tokito, in an alternative universe. He's a demon here, a strong demon. The 4th strongest demon next to the demon king.

To the point you were suprised to see him a demon now. He was just a Hashira back then, how'd he turn to a demon?

And what's worse is you liked him back then.

" ..." Muichiro and the other uppermoon demons are preparing to attack the headquarters..