[Frankly the grumblegrowl is hot and that is a Problem! Vergil is not supposed to be hot, he's supposed to be a big dumb thorn in Thancred's side! Of course, he also does not want to give in. In sheer competitiveness, they're equals.

Fortunately Thancred has approximate three more brain cells than Vergil, so he will eventually stop. But only when he catches himself starting to lean full-body into Vergil, and a very embarrassing noise slips out.

At that point he backs off all at once, wiping his mouth and looking down to hide his flushed cheeks and hazy expression.]

...I suppose you're not the worst.