DISCLAIMER!! Aether and lumine have no canon age and neither of them is underage. Both of them has been traveling different years for so many years so therefore they are not from teyvat. And xiao isn't a human he is a yakuza so please if you don't approve of this please leave and don't comment anything negative.
When aether and xiao travel together aether would always bring almond tofu. When aether falls asleep he would say in the back of his mind that the traveler cant put his guard down but still lets him sleep.
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When xiao gets hurt aether would always panic and try to treat him even he isn't really an expert.
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Every time when they both travel together aether would sometimes fall asleep and have nightmares and xiao would try to calm him down but he never really mentions it when aether wakes up,
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Aether cant to say no to people so when doing commissions aether gets really tired and when he visits liyue xiao finds him and xiao noticed his tired-looking face xiao comforts him.
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When aether thinks of his sister he becomes needy but refuses to show it because he didnt want to become a "burden" though xiao always notices it and let Aether cuddle him.
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Aether likes to hold hands with xiao but xiao refuses to show that he likes it.
Thats it for this chapter ^-^ i hope I see you next chapter <333

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^ Aether headcanons ^
Fiksi Penggemarstory cover creds: @__Frederica DISCLAIMER !! non of these are canon in the games these are simply headcanons I hope you enjoy this book ^-^