Class Mage Relative(s) Park Kyung-Hye (Mother), Sung Jin-Ah (Sister),

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Sung Il-Hwan (Father), Cha Hae-In (Wife), Sung Su-Ho(Son), Yoo Jin-Ho (Brother in Law)

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Guild Ahjin Guild (Guild Master) Affiliation Korean Hunters Association (helper), White Tiger Guild (helper), Hunters Guild (helper), Knights Guild (helper), Ahjin Guild (Guild Master)

Seong Jin-U is the protagonist of Solo Leveling and is known as an infamously weak E-Rank Hunter. He is a humble and benevolent individual who cares deeply for his family and has an ardent desire to become stronger. As a result, he shares a close relationship with his sister and his mother, and rarely wastes an opportunity to refine his skills and gain more power.

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He becomes an S-Rank hunter after being given a chance to become stronger by the System.