Sun

Sun is a secret organization that attempts to acquire the Heaven Crystal by sabotaging, and eventually destroying the Department of Night. It is currently headed by Liu Damao, and has at least nine members. Their base of operations is a single house less than 200 meters away from Xiahou High School.

History
Sun was created by Liu Damao in order to destroy the Department of Night and take the Heaven Crystal, which means it was most likely established after the Dong Guan arc, when the Heaven Crystal's fragments were first discovered. Since then, the organization secretly recruited several powerful members to strengthen itself, including the Nightwatcher and swordsman Three, the legendary demon assassin Jian Tong, and the intelligencer Spinach. A month before the Ye Lanlan Arc, Nightwatcher prodigy Ye Lanlan joined Sun in order to duel with her older cousin and secretly gather intel on the organization. After leaving Sun at the end of the arc, Gu Xiaohua joined and filled in for Ye Lanlan's vacancy.

Rules
The first creed of Sun is unity. Any member that causes disunity within Sun, such as intentionally harming a fellow member or deserting the organization is punishable by death, though they can avoid being killed if they cripple their own powers.

The second creed of Sun is honesty. Any member that fails the test of honesty secretly initiated by Liu Damao, such as purposefully hiding information crucial to the organisation's benefits, will be punishable by death, though they can avoid being killed if they cripple their own powers.

Members
Liu Damao: The leader of Sun. He is referred to as "Boss" (老大) by members of Sun. Considering the way Wang Shengli addresses him during their phone call, as well as his ability to forcibly make Ye Lanlan a guardian in the Department of Night, Liu is likely a figure of significant authority and power in the government.

Xumi Ruo: A white-thorn monster of unknown origins. He is referred to as "Two" (老二) by members of Sun.

Three: A Nightwatcher and swordsman. He was referred to as "Three" (老三) by members of Sun. He possessed three Demon Flags, indicating that he was a member of the main branch families. He was later killed by Jian Tong for attempting to assassinate Ye Lanlan during her duel, which goes against Sun's creed.

Wu Fengyun: An Executioner. She is referred to as "Three" (老三) by members of Sun, replacing the original Three's after his death.

Jian Tong: A legendary Luoren Demon known as "Assassin Queen" for her numerous successful assassinations. She is referred to as "Five" (老五) by members of Sun.

Gu Xiaohua: A side branch Untitled Sage, as well as the primary antagonist of the series. She is referred to as "Seven" (老七) by members of Sun.

Ye Lanlan (temporarily): A main branch Nightwatcher and cousin of Ye Yan. She joined Sun in order to meet and test her cousin's abilities, as well as gather information on the organization. She deserted the organization after her duel with Ye Yan in order to treat her cancer, which weakened her powers, allowing her to avoid being killed as punishment. She was referred to as "Seven" (老七) by members of Sun.

Spinach: An intelligencer possessing vast amounts of intel on many subjects. He is referred to as "Nine" (老九) by members of Sun.