Niko Aoki

Niko was the first OC that used to be based off a person, now he's no longer based off a person and isn't considered real.

Personality
Niko is flirty, but he can't flirt as much as his fiance. When given the opportunity, he's excellent at fighting. He is considered the dad of the group, considering the fact he's more mature and older than the rest of the group, this doesn't mean he isn't a pervert though.

Meeting Ari
As said earlier, he isn't real. So Ari just said he met Niko through Evelyn.

Evelyn
Evelyn is his confirmed fiance. They are deep in love although they act more like brother and sister in public. They are both yanderes and will hurt anyone who tries to get in the way. Niko met Evelyn when they were just kids.

Aaron
Not much is known on how they met, but they are currently really close. Niko is jealous of Antonio, because Ari seems to be closer to Antonio. Niko can't really do much, knowing if Toni got hurt, Ari would go full protective mode.

Toni
Toni doesn't even know Niko exists, but ever since Niko learned about Ari having a huge bond with Antonio, Niko has grown jealous of Toni, because Niko wants Ari to be his brother and nobody else's. Niko swore that somehow he'll eliminate his rival.

Millians
So many rumors has been going around about Niko and Mill secretly being gay for each other. Ari only confirmed that Niko has small feelings. He never confirmed if Mill has feelings.

Trivia

 * Niko was originally based off Evi's ex.
 * Niko is in fact bisexual.
 * It's confirmed he loves Evelyn, but has small feelings for Millians.
 * He has a (unconfirmed) daughter, Nina