Raiketsu is Zhongli and Raiden Ei's biological son. So Qiqi is his adoptive sister because Zhongli and Ei adopted Qiqi.
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Last Judgement
Carried by Barbatos
Wait, wait, wait, wait...
Carrying a lover
Lesson of lyre
Open air dancing
A quiet afternoon at Blueberry Academy
Natsuki (my take)
Let your emotions go
She's still sleeping
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