The Will of the Moon

[Iscah]

I killed the mnk dude,dot both of them,heal hien and myself.
I don’t know if i can just leave the mnk alone but as main dps to the very soul .. I just kill everything.

If you read the 'speech bubbles' that come up over the screen or in your text log, Hien is telling you to leave the other guy to him and focus on Magnai.

(I think it's essentially a you-vs-Magnai solo battle and the others are mostly there for decoration and/or so Hien isn't left out of the fight.)