Asuramaru

Asuramaru (阿修羅丸 Ashūramaru, lit. "Perfect Asura") is one of Luna's love interests in the series and a demon. His past name was Ashera and the older brother of Alice.

Personality
Ashera, in his days as a human one thousand years ago prior to the series, enjoyed viewing the blue sky and gazing at the sun. He regrets leaving his sister behind and becoming a demon. He also cares for his family. Unlike his sister, Ashera was not thankful for everything they had since he was from a noble family.

Asuramaru is a blood-thirsty demon who was originally a vampire.

Like all demons, he is manipulative and uses nightmares to consume the one he possesses in order to take over his host's body.

Asuramaru thinks of humans as vile, greedy creatures who are even worse than vampires and demons. He considers them to be taboo-breakers who will destroy the world, and also thinks no better of angels as he considers them to be disgusting.

Asuramaru becomes seriously annoyed when someone else disrupts his mind.

History
Ashera was born in a noble family with his sister Alice, where they spent their days cheerfully, and Ashera enjoyed staring at the sky and the sun. One day, he was staring at the sun on a grassy hill when Alice tells him that their mother was looking for them. The two have a conversation about Ashera's interest in staring at the sun that started with Alice disagreeing as their mother told her that would burn their eyes. Ashera then asks Alice about what did their mother want, Alice says it's time for lunch. After a little argument, both of them go back to have lunch.

However, they see their house being burned down, worried they rush over there only to find their mother as she screams to both of them to run not long after she's been speared in the stomach. The rebels screams to kill all the children of nobility but they decide to sell them as slavery. Alice and Ashera separate, as Ashera looks at the sun for the last time.

Trivia

 * Maru 「丸」 is a common suffix to male Japanese names.
 * Asuramaru refers to himself with "boku" (僕), a first-person Japanese pronoun usually used by males, but also used by some females, so Asuramaru's gender was hard to determine. However, it was confirmed in the latest official fanbook that he is indeed male.