Master Heartless was pissed off at the idiot in front of him who was about to implode himself just for some stupid revenge that he couldn't take normally.
What was even the point of getting revenge when he was going to die!? Were his teammates that precious, then perhaps he shouldn't have run away like he did last time and stayed to die with them.
'Aaagghhh~! Damnation!'
If it weren't for the attack he received while he killed Eric then he wouldn't have been in a dilemma as he had great confidence in himself to block the attack and survive.
But now he couldn't put a decent block against it with one hand missing, and the only thing he could do was run.
This was probably the second or third time that he was about to run in fighting an opponent, and he didn't like this action in the least, but to survive that was the only way out.