Cristo Kal.
From what I remember of him in the game, he was one of those side characters who only got a brief spotlight in this arc.
Not a mini-boss, not a mid-boss, and certainly not a final one. Just… there.
A piece on the board that most players overlooked.
He was, however, described as a candidate for true demonic possession by the demon king Asmodues.
Across the many routes I completed, he never quite reached that point—but when [Act 4 — Chapter 5: Lightbringer] came around, he did end up becoming a dangerous assassin-class demon.
He wasn't strong enough to be a serious opponent on his own.
But tricky? Absolutely.
Annoyingly tricky.
His role in the climax wasn't to overwhelm the protagonist, but to create openings—just enough of a distraction for Asmodeus to land hits that actually mattered.
And that was what made him dangerous.
In terms of experience points, he was practically worthless.