Art by   Brygaht

Rendered example and full rez SFW

~
Official reference of Flint's normal fox form as a full adult and Hunter (well the LGP version of him as he is just a spirit in the ZER0 plane)

Flint's normal form as a Kyuubi and demon, though one who has inherited the Kyuubi ability from the sacrifice of his closest confidant, his is a fairly well rounded Hunter that that specializes more in strength then dexterity, though has a knack for machines and technology despite his upbringing. Flint wields a quiver like canaster that captures lightning from storms to utilize as a mechanical type of Psynergy, a homage to his fallen confidant, combined with a mechanical curved sword that transforms into one of three forms, each one a reference to either himself or one of his two friends from childhood, Ion and Zephyr (Sword of Ion, Spear of Flint and Scythe of Zephyr). Flint is heavily close to the mystic, adjacent to the power of Gaia the element of Earth, though his proficancy in the mystic arts of Psynergy (referred to as Alchemy by his Domain) is somewhat lacking, while he does have some powerful Psynergick arts (referred to as Geomancy by his Domain) he is more proficient in transferring his Aura into objects and controlling them like a puppeteer, again a more mechanical form of Psynergy. Flint's mastery of this style allows him to create mechanical looking dolls in the shape of small foxes from the earth and imbuing his Aura into them to create almost robotic like solders that can attack anything nearby or explode into their raw material creating a devastating blast type weapon. Flint's signature of puppeteering is his scale puppet of his fallen confidant that he can imbune not only with his Aura but the soul of his fallen friend that resides within himself, giving him a temporary body to act as a familiar for a set amount of time
~