User blog comment:B214/Don't ask about season 4/@comment-50.139.232.230-20161026135946

Aito Ohashi who did most of the Key Animation of Season 1 and 2 needs to do more then just OP key frame work, its why the 3rd season had poorer animation quality overall.

He needs to be the main animator of [Issei vs. Sairaog Bael]