Feng Xueya

He saved Wu Yu from Wan Qing and brought him to Heavenly sword Sect

Killed by Yan Huang Ancient Emperor to take his body as clone.

Formerly accepted Wu Yu as his fifth disciple. - chapter 33

After all, Feng Xueya's specialization in the sword was not just about technique, but about the spirit of the sword. He was a sword saint! He had accepted Wu Yu as a disciple in order to further his legacy, but Wu Yu had actually chosen another path. That meant that Feng Xueya would not be imparting much to him.

Feng Xueya was a prideful senior. Wu Yu's choice indeed displeased him.

But just as Wu Yu had said, this might be his destiny.

Feng Xueya believed in fate, and he was someone who enjoyed unusual characters. His legacy was already succeeded by four disciples, and he could spare Wu Yu. But he thought it was a pity, because Wu Yu would probably have to find his own path in the future. (chapter 34)

"Of my disciples, the one most like me is Night Wish for Snow. The most unruly is Yang Qing. The most unfettered is Mo Shishu. The one who respects me the most is Yanli. And the one that intrigues me most is this Wu Yu!" - Feng Xueya