Liu Qingge is the Bai Zhan Peak Lord.

He was originally killed by the real Shen Qingqiu during a qi deviation. When Shen Yuan transmigrated, he instead chose to save his life.

After that, Liu Qingge becomes an ally and a friend.

He's shown to have feelings for Shen Yuan and doesn't like Luo Binghe.

Personality
Liu Qingge is someone who is hot-blooded, arrogant and bold. He likes to fight and have bad blood with the original Shen Qingqiu. Due to his blunt personality, he may seem hard to approach.

However, he can also be undoubtingly persistent as shown when Luo Binghe was in possession of Shen Qingqiu's corpse, he went and attempt to retrieve it everyday without fail, even if he was defeated by Luo Binghe every time.

(Source: The Scum Villain's Self-Saving System Wiki)