Kunitomo originates from the Japanese Matchlock Guns category. He stands 168 centimeters tall, weighs 60 kilograms, and presents a slightly short stature with plain looks. His reddish-brown hair is styled in a straight bob, curling around his face and parted to his right, featuring a distinctive upright strand on top. Black eyes and fair skin complement his commonly depicted pleasant smile.

He expresses strong enthusiasm and pride for the firearms of Kunitomo Village, frequently describing them as embodying "beauty in practicality." Kunitomo emphasizes their historical popularity, reliability, and widespread endorsement during the Tokugawa shogunate, openly admiring their sleek design and craftsmanship. He often encourages others to recognize their greatness. Personally, he enjoys cherry blossoms and shabu-shabu, with ceramics as his hobby.

Within the narrative framework of the Noble Musketeers—human manifestations of antique firearms fighting oppression—Kunitomo operates as part of the resistance, utilizing his associated matchlock gun. The Kunitomo matchlocks are characterized as refined masterpieces known for practical beauty, originating from a village that served as a prominent firearms production center under Tokugawa patronage for over 250 years.

In game mechanics, he is a 3★ rarity unit aligned with the Red Rose attribute. His special ability, "Attack UP (Small)," boosts attack power by 10% at the start of a battle wave but activates at a low probability. Initial statistics include an attack value of 390 (single hit), evasion of 330, accuracy of 350, and a "Fairy’s Protection" stat of 20. No concrete information exists regarding specific story arcs, character development, relationships, or expanded background across official media adaptations or spin-offs.