Sai

Sai is a winged human from another world gripped in the clutches of war by an Empire seeking a powerful magic artifact and slaying anything and anyone in their way of conquest. He is a victim of that war, having one of his wings ripped from his back, leaving him highly traumatized and with a mechanical wing to replace that which was taken from him. He somehow fell through a rift and ended up in Ikebukoro, where he would run into the mysterious Izaya and end up living with him, working alongside him as an info broker.

Background
Sai was born on the continent of Mira in his home world which no one remembers the name of to Gena and Guillo. 10 years later, his sister, Xehla, was born. When Sai was 15, he came across two soldiers of a separate continents army harassing friends of the family, and he stepped in to help them. Unfortunately, the next day, the soldiers came back, slaughtering his entire family before his eyes and burning down his home as “punishment for his meddling”. As an added “punishment”, two soldiers ripped out his right wing, and left him there to die.

He was found two days later by nomads, and his wounds were cared for, and one of the nomads (who turned out to be an old friend of his father) gave him a Winglet that used to be his grandsons. When Sai's injuries were healed, he set off to move to one of the different sky islands of his home, but as he set off, a mysterious lightning storm struck Mira, and the powerful winds knocked him out of the sky and knocking him unconscious. When he awoke, he found his was in a different world our modern one and was discovered by a man named Izaya Orihara. Having nowhere else to go and being in a strange world, he moves in with Izaya, becoming an informant.

Appearance
Sai has lime green hair that’s short, but somewhat long enough to pull into a small ponytail and turquoise eyes. He has one wing that’s lime green, and a Winglet which is an artificial wing. His physical wing can manifest at will, and even though it looks like its made of light, it's physically tangible and can be touched, though doing so without permission is considered taboo in Sai's culture.

Trivia

 * Sai is obsessed with honey flavored snacks and often keeps a sizable stash of it in his apartment. Of course, he's mocked relentlessly for it.