Gin & Aoi

Gin and Aoi are maternal twins and are introduced to the story by Sinner meeting Gin at his workplace. They and Yachi become his friends over time while he is figuring out his feelings for Saint. Even though Gin doesn't seem very happy at first about this, Aoi encourages him to support their new found friend and they start to become a essential part of Sinner's life and Character development.

Gin and Aoi are very close and would protect each other no matter the cost. Thought they differ in the ways they show this behaviour.

Past Life & Death
Unlike most human-born Demons Gin and Aoi are able to remember at least parts of their past. They grew up in a town with a high poverty rate and, as follows, a high crime rate. They both weren't the kind of kids to get into trouble on purpose, but they also couldn't get around it either. Ever since Aoi came out as trans it just worsened.

One day on their way home they were approached by a group of mobsters that have been bully- and threatening them before. They both ignored the group, trying to seem unbothered by it, which just aggravated the group just more. They started following them, first slowly, then running after them when they started running away. Gin was heading into a abandoned ware house area, attempting to shake of and hide from their chasers. This plan failed though, they were brutally bashed up and stabbed with knifes. Gin lost consciousness in between and was assumed dead by the gangsters, while they beat down more on his sister. When he woke up Aoi was in the process of dieing. She layed on top of him, and he was to weak to move or do anything and had to watch while she died from the last stab wound. Gins wounds were serious too, but his death took longer.

Other demons assume that the connection in their life and process of their death is the reason why they haven't forgotten the past. Forgetting their past would be forgetting each other, so their even though their souls shattered when they died, their love and necessity to stay together didn't sever their connection. Since these Occasion are very rare, no one is quite sure what is the exact cause of this situation.

Gin
Gin is the older of the two and feels like he has to protect his sister at all cost. He is very overprotective and doesn't like any new individual entering their lives, and approves neither of Sinner nor Yachi at the beginning. Even with time he is very suspicious of them, especially Yachi, because of her rascal behaviour and closeness to Aoi.

He isn't aware that he is overdoing it, and even though Aoi assures him very often that she is very capable of protecting herself and that things are okay, he cant stop this behaviour. The circumstances of their death, and the ability to remember it doesn't help him at tackling this issue, it just worsens his feeling of failure and guilt.

This guilt doesnt just affect his connection to Aoi, and the people involved with her but his own relationships too. While he isn't particularly keen on getting into a relationship, he isn't able to trust anybody enough to get into a relationship. He often says it doesn't bother him and that it is better this way, because a partner would complain about his sex work at some point anyway.