Hiei VS Accelerator

Description
Anti-hero deuteragonists with tragic pasts that made thrm resentful towards others, and are S-Class among the rest of their kind, Demons and Espers respectively, and were the former rivals of the main protagonist with similar signature moves and personalities, and while Hiei is a demon from the past, Accelerator is a human from the future. Both also eventually turned to the side of good later on, and their moveset is a perfect counter towards the main protags own, but still can't seem to surpass them.

Conclusion
Who are you rooting for? Hiei Accelarator

Who do you think would win? Hiei Accelarator