Ronove

He thoroughly dismantles angels even after the battle is over, and when he appears on the battlefield, his ally devils, not the angels, are filled with lunacy and charge at the angels.

Therefore he is a devil that all devils avoid, even in Abaddon which is famous for being a place where abnormal devils are gathered.

As the number 1 devil for 'the devil I don't know what he's thinking of', the only ones who can have a proper conversation with him in Hell are Asmodeus and Beelzebub, and you.