Yuan Tian

He was the guardian of the Sword Myth Springs.

Shiro's Party met him while they were in the Trials: Sword Myth Springs.

He asked Shiro to a 1v1 because to him she was the most talented person he have seen in all his year as a guardian. After having been beating by Shiro and seeing that see calls herself 'this princess' he started to treat her as his Princess and addressing her as such.

He tried forming a contract w/ Shiro to follow her and see how high she can go but due to Yin's contract w/ her, he was not able to. However having this feeling of he would regret it for the rest of his life he decide to form a contract with Lyrica instead so he could accompany Shiro.

Chapter 161 - It is mentioned that he was dead at one point and currently he is now technically a monster.

Appearance
As The Watcher

Spiritual Entity

 As Yuan Tian 

A handsome young man standing at 1.8 meters. He had black hair and black eyes and wore a white hanfu.