I should probably explain how such a character as Yoku appeared.
He is a companion for the female main character of my story titled "The Cat". In small (~1000 words each) stories I depict the life of a werewolf girl Tairi.
Yoku is a vampire, and they've got acquainted mostly by accident: the Cat had saved him from a cruel execution, and he promptly told her she was now responsible for his life because of that. Earlier he wanted to die, having lived a long life and craving for common human existence. Yoku was nicknamed the Orphan for his habit of adopting orphans — not turning them to vampires. In due time he eventually had to bury his aged adoptees.
Nevertheless, Tairi made his love for life return.
No, they're not lovers and they won't be.
Soon I'll be finishing Tairi as well