I wonder if Xilan clan has somehow neutrality in their blood/genes? The show states several times (Shanqgue, Yunzhong) that their clan lived in Xishan since forever to guard the three realms from the evil gods and that's why they always remained neutral and their neutrality was respected by everyone.
And you can't help but notice that XLH keeps pushing for peace (she doesn’t want the war, she doesn’t want to betray Shuiyuntian but she also doesn’t want Moon Tribe to get hurt) and is trying to remain neutral. She doesn't want to choose sides because she doesn't draw the line between the good and evil. It’s not important to her.
That's why she sees the good in DFQC since the beginning (and why she is oblivious to the hypocrisy - yes, I'm calling Yunzhong rule as that - of Shuiyuntian). She does have prejudices against the Moon Tribe but that's because she heard only them all along and she doesn't know anything else. Once she does get to know the Moon Tribe, she considers both realms as 'good people'.
She starts to defies this neutrality once her love for DFQC is cemented because that love is selfish (she loves only one) and while also selfless (she loves him so much that she sacrifices herself several times for him), it's not the same kind of general love for everybody that keeps her neutral.
I don’t think any other of the main characters has this sense for neutrality as much as XLH does.
Maybe I am way over my head but... I just think so.
