Ja Wangnan climbs the Tower as a Regular determined to become its king, marked by persistent resolve despite repeated failures, especially on the 20th Floor. His appearance features distinctive red horn-like accessories and a red ring bearing Zahard's emblem, with a youthful look masking his true age—old enough to be Karaka's brother. Raised by a nanny who called him the "seed of the king," he has no known parental figures. His connection to Zahard remains undefined, though he is labeled Zahard and the 10 Great Families' "biggest mistake" and "fatal weak point," hidden by them. Guide Hwa Ryun dubs him the "Prince of the Red Light District," which may insult Zahard's Princesses or nod to Wangnan's potential illegitimacy. Unaware of his full origins, he acknowledges being an "extremely remarkable person." Wangnan exhibits unwavering determination, vowing to "never give up" after failures or betrayals. He values companionship, forming teams like Sweet and Sour to stave off loneliness, and empathizes deeply with struggles, as shown with Nya Nia and Kim Lurker. Guilt over endangering allies fuels his desire for protective strength. Idealism drives his vision of a Tower "where everybody can smile," yet he pragmatically allies with morally ambiguous figures like Viole. He copes with tragedies, such as surviving an incident where allies died, through selective memory. During the Workshop Battle, he allies with Khun Aguero Agnis to rescue Viole (Baam) from FUG. Overcoming self-doubt, he accepts Khun's mentorship in rigorous training, solidifying their team's resolve. In a pivotal moment, he summons Viole during a crisis, enabling their escape despite Beta's interference. Post-Workshop Battle, his journey darkens as he climbs higher. He swears vengeance on Rachel for killing ally Akraptor, reflecting a shift toward moral complexity. An encounter with Karaka, who shares his ring, hints at deeper ties to Zahard, positioning Wangnan centrally in the Tower's conflict. His abilities include limited shinsu manipulation, reliance on explosive "Shinsu Bombs," and unique regenerative immortality allowing survival of fatal injuries. Despite physical weakness, his leadership and charisma attract allies. He continually seeks greater power to avoid being a "burden."