I never quite found out why we had to kill the princess in the dungeon. I vaguely remember the questgiver specifically asking us to not kill her.

I felt kinda bad we killed her then never went back to face the questgiver again, supposedly because we failed and now I cannot look him straight in the face, eye to eye, anymore.

Because this instance wasn't a requirement for the MSQ, I left it alone until I was quite a few levels over it.But I did do some of the fetch-gather quests from the undersea bubble and I don't remember any of them having to do with Shishui and the princess. Could someone please explain to me what happened in that whole quest arc?