Syrlya's eyes widen as the fireworks crack off just as he's getting away from the ladder and closer to the group. He waits for a moment, watching as Mari disappears through the shadows. Fireworks, at least, aren't as long-lasting or covering as an actual fire. Syrlya moves forward immediately towards the explosion, and then blinks himself forward through the explosive lights to the other side.

He ends up some feet away from Mari and the Warden, but he's at least close enough to see them. And that scream makes him flinch.

"Careful!" It's a warning, and while he gives Mari the room to do... whatever she's doing, he is coming closer to close the distance. He just needs to get arm's length from Sans, and he may be able to stun him.