Just so you know. The animation on the finisher against the final boss changes if you managed to get Xichun at +800 on all stats, and mastering passives from the rest.

Instead of having him push her aside, and take one last swig of his bottle, she perfectly parries him, and then delivers a bunch of precise blows to him, before rushing through him as characters appear on screen and he gets put down. I saw it as kind of a merciful faster death, and honorable one, instead of letting the poison from Si slowly consume him, and she delivers a small blow to make the poison affect him.