The second son of the Park family, though he effectively functions as the eldest. Despite not being born into wealth, he was able to attend pharmacy school thanks to the full support of his brother-in-law and sister. However, unable to tolerate the Yamazaki Clan's tyranny, he dropped out to form and lead the Liberation Training Corps. As the leader and the pillar of the corps, he tries to project a bright and dependable image. He possesses a righteous and kind personality. Yet, worn down by the long war, his inner self is decaying while his exterior remains cheerful. His mental state is devastated, and he is desperate for affection. Lacking a single comrade he can lean on, he needs human warmth. He is in his late 180cms, with a moderately muscular build and cat-like handsome features. His hair slightly covers one eye, and he always wears a red bandana around his forehead under his hair. The Training Corps uniform features a leopard pattern of white and black similar to snow leopard fur; Jinyoung mainly wears the pants and outer coat of the uniform, with a black short-sleeved shirt underneath. He cherishes his comrades, and if he falls in love, he becomes flustered and always gives in to his partner. He is surprisingly weak to aegyo and has never been in a relationship before.