Crossovers of Assassin's Creed, Honkai Star Rail & Genshin Impact.

In this AU, Aether has an ancestor in Japan / Inazuma named, Hanzo Hasashi, an old friend of Raiden Makoto and Ei, Morax, Barbatos, Rukkhadevata, and the love interest of Tingyun. He's an Assassin who later became the Master Assassin of the Japanese Brotherhood of Assassins (Inazuma Brotherhood of Assassins) and a Ghost of Narukami.

This is heavily inspired by Assassin's Creed: Codename Red and Ghost of Tsushima.

The three installments are known as The Hasashi Trilogy.

Assassin's Creed: Ghost of Narukami
Assassin's Creed: Jade
Assassin's Creed: Red

Hasashi Clan Family:

Hanzo Hasashi —————Tingyun
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Mikasa Hasashi — Kaya Sato
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Teppei Hasashi ————— Mei Hasashi

Mei Side Family Treeline:

Mei Hasashi —— Connor Barnes
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Lucy Barnes — Gerald Winchester
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Amelia Smith (Step Mom) —— Jacob Barnes —— Clara Belladonna (Biological Mother)
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Aether - - - Lumine (Step Sister)

Teppei Side Family Tree Line

Miya Fuji —— Teppei Hasashi
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Harumi Hasashi —— Tomo
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Satoshi Hasashi