Юн Сиу́

He is a proficient relic user. He was once the heir to a large corporate firm until he fooled around too much which resulted in him being disowned and kicked out. After Chairman Kwon Tae-Joon saved him and ensured he has some sort of success in his life, Yoon Si-Woo now serves as his right hand man. Seo Joo-Heon defeated him multiple times and stole many relics from him such as The Voodoo Priest's Zombie Powder and Emperor of the Ch'un Dynasty, Liu Bei's Sword.