Roy Valentin/Relationships

Luminous Valentine
His master whom he served loyally.

Louis Valentin
His twin brother. They were originally one vampire being known as Valentine. After the split, they both possessed different abilities and personalities. Louis was indifferent to Roy's death, suggesting they didn't see eye to eye.

Gunther
A fellow servant to the same master, Luminous. It was noted by Luminous that they would compete for supremacy within their ranks, and it is assumed that their relationship was not a good one.

Hinata Sakaguchi
Once, they battled each other, and Roy lost to Hinata. When Hinata became Luminous's subordinate, the two became confidants of the vampire queen. Hinata used Roy to strengthen the Ten Great Saints and leveraged his role as a Demon Lord to convert the scared masses into Luminism. Hinata was shocked by Roy's death.