Fox-ninja creatures who each master one melee and one ranged weapon from childhood, ninja-turtle style.
Razor Foxes are fox-people ninja creatures, first properly examined by Carl via Chiyome of The Wild Hunt. Each picks a weapon proficiency in childhood — 'kinda like a ninja-turtle thing' — training in both it and a ranged weapon (usually throwing stars). Their magical bodysuits normally block examination; only their exposed eyes reveal their stats.
Female Razor Foxes wear red (for reasons the system professes not to know). They move by silent acrobatic somersaults and favor team 'form magic' like Size Up.
Four-foot upright foxes with expressive muzzles, clad head-to-toe in weapon-themed magical ninja suits.
A ninja-fox species making up The Wild Hunt racing team.
Also appears in books you've already read — spoiler-safe to their endings: