Better him dealing with it than Kain, though his own shard is pulsing and glowing. But he's got something to fight and finish off, so he's going to focus on that for the time being.

He glances over when the Doctor speaks up, and gives a brief nod of understanding, before he returns to the enemy, raising his sword in defense. He waits... and then on the signal, he springs into motion, striking the demon with all his might. The creature's pained howl echoes throughout the area as it collapses.