Aekari Lumire

It's the person that saved Shiro from the scientists in her first life but also the one that killed her because she became stronger than him. He is also the one that killed her in her second life.

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A handsome man who looked like he was in his mid 20's. He had a set of refined features that made him look a little feminine in a good way. Long black hair that reached his back and a fire marking that extended from his right hand to his back.

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When Aekari was young his was a nice guy willing to sacrifice himself for everyone, willing to do anythng to help the people.

One day, The Light Goddess showed him a future where the world was falling apart, millions of people dying. The Light Goddess told him it was the future. That he wasn't there helping people because he was too weak, that Nytri wasn't here because this doesn't concern her.

She enticed him to take care of Nytri and take her powers for himself to become a God. Aekari accepted and was sent back into the past, this time determined to kill anything in his way to power. "They're all EXP for me to gain."

- Aekari Lumire, Chapter 524

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Duan Han Yin was kind of best friend with Kuromi in her second life, but one day the look in his eyes changed and became disgust with her. This is probably when took over the body and recognize Nytri's reincarnation. He then took care of breaking every link in her Mana Realm before killing her.

While going to save Yuki that was emprisoned by Aekari they discovered a dungeon expanding, a place where people where farmed for EXP, exactly like did in Shiro's first life. That's when Shiro thought Aekari was reincarnated.

When he was talking with the War God we learned that the one being in the Xion world was an Avatar of his.

Later in that battle his avatar was killed by Shiro using her skill, [Extraction].