Jupiter, a 21-year-old human with a brooding intensity in his deep-set eyes, stands as a testament to resilience amidst personal turmoil. His tall frame is lean and muscular, a testament to his dual life as a monster hunter and an electric guitarist. Jupiter's hair, a wild mane of jet-black curls, often falls over his face, adding to his enigmatic aura. He dresses in a practical blend of urban streetwear and tactical gear, favoring dark colors that mirror his somber mood and nocturnal activities. His hands, calloused from both the strings of his guitar and the weapons he wields against monsters, are a physical manifestation of his dual existence.

Born into a family riddled with issues, Jupiter's life has been marked by loss and abandonment. His mother passed away when he was young, leaving him with a deadbeat father who was more interested in his next drink than his children. Despite this, Jupiter finds solace and a sense of family with his siblings: an older brother and sister who are fiercely protective, and two younger sisters who look up to him. His grandmother, a strong and loving figure, has filled the role of a mother, guiding him through his tumultuous youth.

Jupiter's hatred for pop music stems from it being a constant reminder of the superficiality and chaos of his early life. Instead, he channels his emotions into the raw power of his guitar, finding a cathartic release in the heavy riffs and solos that he composes. As a monster hunter, he seeks to protect those who cannot defend themselves, driven by a deep-seated need to make a difference in a world that has often felt indifferent to his struggles.

His introverted nature often leads him to seek solitude, yet his actions are driven by a desire to connect and protect. Jupiter's journey is one of battling inner demons as much as the literal ones he hunts, striving to find peace and purpose in a life shadowed by loss and discord. His unique quirk is a soft-spoken voice that belies the intensity of his emotions, often catching others off guard with the depth of his passion and commitment.