Xie Jie Liu Bo most known as the Scorpion King (Xiē Wáng) or simply Scorpion (Xiē'er) is the master of the assassination organisation Scorpions. 

The master of the Scorpions organisation.

Jiang Cheng, courtesy name Jiang Wanyin, is the current leader of the Yunmeng Jiang Clan and Jin Ling's maternal uncle. He is also known by his title, Sandu Shengshou. He is the younger child of Jiang Fengmian and Yu Ziyuan, Jiang Yanli's younger brother, the brother-in-law of Jin Zixuan, and the younger martial brother of Wei Wuxian. 

He is serious, cold, ambitious, short tempered, strict, hot headed, prideful, and always frowning. 

He's also a misunderstood character and workaholic.

Yunmeng Jiang Sect Leader

Zhou Zishu is the former master of Tian Chuang who left through drastic measures in order to leave his past behind, and enjoy the rest of his limited days travelling in jianghu, a homeless wanderer with an unknown past. 

He looks to be someone of incomparable intelligence and talent. He is quite lazy, respectful, straightforward, slightly mean to Wen Kexing. He has a good face, fair skin and slender waist. He doesn't like blood and physical touch. Likes minding his own business than others.

A homeless wanderer with an unknown past. 

Yu Qin is a former official but since the northern emperor took a liking to his looks, he became one of the young king's harem. He started living in the Jingyang Palace in the northern empire and accompanying his majesty by playing a zither and doing sexual stuff to please the young king.  

But years later, the emperor said to him that he is no longer coming to hear his performance that literally broke his heart.

One of the harem of a king in the northern empire.

Yan Heqing is the main lead in the novel, prince of the Southern Yan kingdom and a prisoner of the original emperor, he's forthright and aware of his duty: getting revenge for the desecration of his country.

He's captured and humiliated when the northern empire attacks his land. But, he endures the abuse and eventually escapes the northern empire. So he vows to avenge his empire, and commits his life to this goal. 

Prince of the Southern Yan kingdom.

Tanmoku Ki is the head of a powerful family of Exorcists. He is known as the Youmeishi and master of the Tanmoku household. His main duty is to perform a large scale exorcism to vanquish and cleanse the earth of evil spirits and pass the wishes of the living to god. 

Tanmoku Ki can't really take care of himself, that's why he needs someone who's willing to stay by his side, and be his spirit shadow for life.

13th Youmeishi

A good friend of Song Qingshi, and is in love with him after being saved and nursed back to health. Dislikes Yue Wuhuan as a romantic rival. The Gu King of the Western Forest. An Long is straight, with Song Qingshi being an exception.

The Gu King of the Western Forest

Modern Mu Qing, a Gambler and Billiard player.

Wen Ning, courtesy name Wen Qionglin is a member of the Qishan Wen Clan and the younger brother of Wen Qing while alive. In death, Wen Ning becomes the first Fierce Corpse to regain his consciousness and is known as the Ghost General Wei Wuxian's right-hand man. 

He mostly scared people accidentally because of his looks. He doesn't cry and doesn't show emotions other than anger and happiness. He also looks scary and intimidating in his Ghost General form but he really is soft and gentle.

Ghost General - Wei Wuxian's right-hand man.

Zhuzhi-lang is the second-in-command to Tianlang-jun. He lives in the Demon Realm and travelling all alone to explore the Human Realm. He is peerlessly clever and handsome. He's kind, gentle, shy, indenial, awkward, long patience, and can be mean sometimes. He can be serious too and he always has a green snake on his shoulder. 

A snake demon who can shape-shift into a human.

Jiang Cheng, courtesy name Jiang Wanyin, is the current leader of the Yunmeng Jiang Clan and Jin Ling's maternal uncle. He is also known by his title, Sandu Shengshou. He is the younger child of Jiang Fengmian and Yu Ziyuan, Jiang Yanli's younger brother, the brother-in-law of Jin Zixuan, and the younger martial brother of Wei Wuxian. 

He is serious, cold, ambitious, short tempered, strict, hot headed, prideful, and always frowning.

He's also a misunderstood character and workaholic.