Upon hearing Mary underestimate him, one of Mello's pointy ears twitches. A sign of sudden annoyance, not that he's in a spectacular mood already. He hates being looked down on- he's quite insecure under it all.

"If we only need one... I'll thin the numbers now." His signature sinister smirk slides onto his lips, a pair of two-inch fangs slipping out. He practices it, it's plenty intimidating... To anyone who isn't a scary psycho. Under normal circumstances, he'd add his fearsome aura- but it's strangely difficult right now. In its stead, he looms, hands moving from behind his back to his hips to make his size all the more apparent.

They're given a moment to bicker. The voice is still trying to work out what's going on itself, but this is not how the story is meant to go. In the maze, it can conjure up a mutual threat. That'll get them on the same side, surely?