Delmon is a character from the Gachiakuta manga and anime series. He serves as a Janitor, or Cleaner, belonging to the group known as Eager. His physical presence is imposing and memorable, characterized by his incredibly tall and muscular build. He has strong cheekbones, a large nose, and a patterned beard on his chin. A weathered, torn straw hat tied down with rope is a constant part of his appearance. His Cleaner uniform is personalized with a double-buttoned shirt, rolled-up sleeves that reach his shoulders, and baggy white pants.

Delmon's personality is as large as his physique. He is a loud and passionate man who seems to always be shouting at the top of his lungs, yet despite his boisterous nature, he is known to be very well-spoken. His driving motivation is a deep love and protectiveness for his comrades. He has a particular attachment to his lover, and he considers any act of violence or harm against his allies to be absolutely unforgivable. This fierce loyalty is matched by a compassionate and sweet side, as he openly expresses great empathy for the struggles of others.

Before becoming a Cleaner, Delmon worked as a farmer. In this past life, he was close to a woman whose dream was to see a flower bloom in the deadly Abyss. Driven by his desire to help her and make plants grow big, he tirelessly cultivated his own vital instrument, or Jinki, from a water hose. He eventually succeeded in making a flower bloom for her, filling her house with them as his goal. However, his past is also marked by trauma; his farm was once attacked by Vandals, a memory that left a deep mental scar on him. In the main story, Delmon is part of a backup team sent to deal with Vandals and is later assigned to an escort team led by Rudo. He accompanies the group to Canvas Town, where he mourns the loss of a comrade named Gob. During a mission in Penta, the group encounters a character named Amo, whose Jinki manipulates Delmon into attacking his own team against his will.

Delmon's key relationships are defined by his protective nature. He is a loyal member of the Eager team and shows a strong camaraderie with his fellow Cleaners, such as Enjin. He is also notably kind to the protagonist Rudo, loudly apologizing for the hardships Rudo has endured. His most significant bond appears to be with his lover, though details of this relationship remain largely in his backstory. His development is shown in his role as a steadfast and powerful ally, though his greatest moments of growth are implied to be linked to overcoming the mental scars of his past and the trauma of being controlled against his allies.

Delmon's notable abilities stem from his vital instrument, which he calls Great Dumbbell, also known as Thirst Quencher. Reflecting his past as a farmer, this instrument takes the form of a water hose, born from his deep desire to nurture and make things grow big. Its power allows him to manipulate water; anything struck by the water will absorb it like a sponge and swell to a gigantic size until it eventually bursts. The hose has different nozzles that produce varied effects. The Silent Nozzle can quietly incapacitate a target, leaving them unconscious. Conversely, the Strong Pressure Nozzle unleashes a powerful, fast-moving blast of water that leaves large holes in its wake. Delmon himself is also implied to possess immense physical strength.