Genshirou Hattori

Genshirou Hattori is the head butler of the Arisugawa mansion and King's human partner. An expert in martial arts, he has been serving the Arisugawa family for 70 years and protects Aoi with his life. He has seven scars on his back which originated from an accident in which he protected little Aoi from steaming takoyaki balls.

(Source: Wikipedia)