Ataro/Umsuke

Ataro (アタロ) and Umsuke (アムスク) are twin komainu originally owned by Saga no Mamoru. Following his death, they were bound to the Kane Shrine and only released by the arrival of Era Saga. They serve the current Kamen Rider Nio as familiars, being capable of sniffing out any Enmi nearby. Possessing their own Flames of Ari, they can allow Nio to perform a special Rider Kick.

While usually indistinguishable, one major difference sets them apart: Ataro can speak, while Umsuke cannot.