Agnes Tachyon is a horse girl who has short, red eyes, and messy brown hair with a prominent ahoge bent backwards at an odd angle. Tachyon also wears a single earring on her right ear and a long lab coat, worn part of her racing outfit. This labcoat has so-called "moe sleeves" running past her fingers, as well as striped patches on the upper sleeves. Tachyon's full racing outfit features a yellow sweater vest worn over a black collared shirt with a black necktie in a style similar to scientist.