No idea where these designs for her sisters came from but I will say they're very nice. Also, Nerissa feels pretty cute here.

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*Hololive girls says or shows the description of one of their Sisters or Mother*
Fanartist: Say no more.

Also apparently Nerissa also said some description of her Mother, and saying she is the most stacked of all of them.
Yagoo, we are still waiting for the official HolomilfsMoms