[darkinfinity]

Originally Posted by Mars Mode

Spoiler for Pest Light Novels:

From what I could gather from the summaries, Shiroyasha gave to Jin the ability to summon Pest after winning her game, but Jin didnt know it was Pest until he used the ability.

No, Shiroyasha didn't give Jin the what ability, it was Jin's ancestor who completed a game from the Soloman king and got that ability, and the ability was passed down to Jin.

The benefit of that ability is that the maou could use their full power no matter how weak their controller is.