I think it's time to properly introduce my inserted OC's.

Chapter aint mandatory-but it does give info~~~

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Name: Kuragari Kanzaki
Age: 5000+
Origin: Created from an unprecedented outburst of negative emotions
Aliases: Catalyst Curse, King of Cursed Energy
Storyline: The Catalyst Curse incarnated itself into its first vessel-whose name was unknown. The old sorcerers gave the first incarnation a name-Kuragari Kanzaki. From then on, Kuragari has gone by that name.

Main relationship: Kuragari has incarnated herself into Y/n L/n, hundreds of years ago. Her newest vessel is one she gets along with more so, because of the Binding Vow they share.
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Name: Hitomi L/n
Age: 260+
Origin: Reincarnated as a vengeful spirit after the L/n clan genocide to enact revenge on the person she deems responsible.
Aliases: Wandering Curse, Vengeful Spirit
Storyline: Hitomi was originally part of the branch family in the L/n clan. After the genocide of the clan, she came back as a vengeful cursed spirit. Y/n L/n-the main cause of the genocide. She wants her dead.

Main relationship: She's using Hana as a pawn. A 'vessel', but not a completed one. Hitomi knows if she attacks Y/n directly, Kuragari will step in and destroy her, curse on curse. So she needs to make Hana strong enough to go head-to-head with Y/n.
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Name: Hana Adébáyọ̀
Age: 34
Origin: Hana moved to Japan from her home country, taking on the name 'Hana' as a first name. She was an upstanding, well-respected citizen, and was fine with staying away from conflict.
Aliases: None
Storyline: Was a normal citizen before becoming the half-vessel for Hitomi four years ago. Did not possess cursed energy, and was fine with her civilian life. Hitomi forced her to undergo rigorous training and changes to mold into a 'perfect' vessel.

Main relationship: Her relationship with Hitomi is strained. They do not have the same bond as Kuragari and Y/n do. Hitomi sees Hana as nothing but a pawn, and Hana sees Hitomi as nothing but a spirit hell-bent on null revenge.
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(Change what you need, this is to give a *general* idea of your aura/attitude)
Name: Y/n L/n
Age: 250+
Origin: Was born into the L/n clan, inheriting the innate technique, Negation. Training to be a normal sorcerer, she didn't let anyone know that being Kuragari's vessel bothered her. After an incident after the genocide happened, Y/n and Kuragari made a Binding Vow.
Aliases: Her, Kuragari's Vessel, L/n
Storyline: Y/n L/n's main goal is to live as long as possible, kill those who gets in her way, and maybe make friends while doing so. Despite never being confronted by modern-day sorcerers, it was a(n) (un)pleasant surprise to see Satoru in her home one day suddenly.

Main relationship: She and Kuragari have a strange, but compatible relationship. Ever since they made the Binding Vow, Kuragari has become a pillar in Y/n's life. Stability, if you will.
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Name: Asuka
Age: Doesn't matter, she's dead
Origin: Was going to marry into the L/n family, but died at the hands of sorcerers shortly after the genocide.
Aliases: None
Storyline: N/A
Main relationship: Asuka was intimately close with Y/n. Some sources say they were married, others say they were 'good friends'. Really, the only one who knows the truth is Y/n herself. But Asuka died a little after the L/n clan genocide. It's unknown how or why.