Uncle Threestrings is a heavyset, bedraggled bird humanoid with features of a crow. He is covered in feathers, has wing-like feathers along his arms, and typical bird-like legs. His hands appear more human, though are completely black with talons for fingernails. He wears patchwork beige pants and vest with a white undershirt that has its sleeves torn off. On his head, Threestrings wears an equally beige and patched boater hat with a brown ribbon wrapped around it. Threestrings also wears circle-lense glasses with zigzag temples and a wide bridge to accommodate his beak.

Uncle Threestrings is easily excitable by simple things, such as cups. He is surprisingly energetic despite being fairly old, even jumping up and down when happy. He also has a penchant for gambling.

His voice sits in the mid-to-semi-high range, carrying a hint of age. It occasionally cracks.