Mu Bai

Personality
He started with a competitive and dismissive attitude, wants to be seen as the best among those who are similar age as him, on the early chapters of manhua he felt disdainful towards Mo Fan whom he considered as his rival along with Xu Zhaoting. After the calamity of Bo City his only focus is expanding his knowledge and cultivation.

He is now seen as a handsome calm individual compared to his now sworn brothers : Mo Fan and Zhao Man Yan. He is extremely knowledgeable when it comes to medicine and demon beasts.

Mo Fan and Zhao Man Yan however occasionally rebuke him for being a hypocrite when it comes to sexual matters as they claim he is just as bad as them but hides it in public.

Biography
During the calamity of Bo City, he helped Mo Fan and fellow students defeat dark beast monsters of Black Vatican. After the calamity he and his uncle relocated to the Ancient Capital with a majority of the survivors from Bo City.

He shows up when Mo Fan visits the Ancient Capital. They seem to have forgotten high school rivalry and work together when the undead of the Ancient Capital sieges the city.

For some reason he doesn't participate in World College Tournament, it is said that he went out venturing a territory of demon creatures seeking for something to improve his cultivation. He has quite the reputation at the Ancient Capital now, shuttling there every now and then in-between his adventures to help with demon beasts among other things. His reputation grew to the point that there were recruitment offers from high ranked clans.

He appears after the tournament story arc when Mo Fan set out for Alps Institute in Switzerland(he also met adopted sister Yan Qiu) and then going on some other adventures with Mo Fan. He is also a highly licensed herbalist and self produces a lot of drugs that heals non-life threatening injuries. Due to his medical expertise he is seen as a sub-healer on the team when they go on adventures.

At some point he got gravely injured by Spectre (A man from the Hall of Assassins, the same organization as the people who tried to kill Zhao Manyan) and encased in a ice coffin, and was taken away by a Japanese woman who works as a researcher with Undead element. Ye Xin Xia informs them that that his soul has been taken to the Dark Plane and no normal means would save him. Mo Fan and friends managed to learn a way to wake him up from his comatose-like situation, by finding a gem called Night Amethyst.

Later on, gets revived by his friends using Night Amethyst. When Spectre tries to kill him later in the story Mu Bai is able to kill him, also confirming the heart-breaking truth that Yan Qiu is affiliated with Black Vatican. It is implied that he possessed some knowledge/strength from the dark plane that allowed him to counter Spectre.

He follows Mo Fan and Zhao Manyan to the Aorus Sacred Institute to investigate the Black Vatican and the frenzied poppies. They disguise as lecturers. Mu Bai uses the alias "Mu Han".

Strength
Despite not showing enough potential at the beginning to be recruited as a disciple of the Capital's Mu Clan like his cousin, he slowly established his prowess over the years by building up a reputation for his medical knowledge and power when defeating demon creatures. When he reached a stable point he decided to join Fanxue Clan to settle down and became the first one in their group to reach the Super Level.

South Wing Platoon
He’s one of the leaders of the South Wing Platoon; a locally established company made up of reliable mages who were in charge of ensuing the safety of Feiniao Headquarters City. They were mainly focused on a members strength and Mu Bai's position as chief speaks volumes of his cultivation.