User blog comment:CelestiaTheGreatPrincess/If CPU Miis are having a social media/@comment-40063314-20191227182244

Chika = Instagram

Cole/Megan = Snapchat

Araceli/Emily/Marco = Facebook

Miyu/Midori/Marisa/Masako = Twitter

Naoko/Abby/Xiao-Tong/Pavel = WhatsApp

Matt/Sota/Na-rae/Abe/Patrick = Tumblr

These are just my main ideas.