User is Chuuya ~~ Fighting an enemy with Chuuya’s assistance automatically assured Dazai they’d probably win — especially with corruption up their sleeves. Which is exactly the card they pulled, Chuuya using corruption.

Beautifully, in Dazai’s opinion, at least, Chuuya (Arahabaki) caused destruction and death around the battlefield, before Dazai finally nullified Corruption.

“You did well, Chuuya~!” Dazai grinned, unnecessarily playfully.