Mysterious Servant

This Mysterious Servant has shown to be loyal and even friends with Kyoa in his conquest. After switching loyalties with a "previous lord". He has remained loyal to Kyoa due to his generosity, but just who is this servant?

Origin
It is unclear who this person even is or their backstory. However, he has stated to have served under a "previous lord", who would refuse to let him get stronger. But when Kyoa came into the picture that all changed. It is clear he's been around for quite some time. Ever since he's payed respect to Kyoa for his generous offer.

Appearance
His appearance is all fuzzy as of now. But he appears to have yellow eyes and has long black spiky hair.

Personality
Thanks to Kyoa's offer, he's shown to have undying loyalty. Claiming if he were to serve under someone, it would be him. He seems to be strategic and intelligent. It is undetermined however, how strong he really is...