Oh! I used to play a lot this game! Lemme think..(My Main was Noelle 👏)
Even thought i think Cryo suits her, MianMian would totally get a Electro vision, like, It's her match. 😭😭
MianMian was always seen as strange and out of place in most places in her old home, she couldn't feel like she belong, and people wouldn't make it easier for her, so she tends to isolate herself a lot until she moves to Golden Grove and all, but in Genshin verse, she probably still would feel like she doesn't belong, i imagine that in that universe, she's a wanderer!! Never staying so long in a place. (I totally imagine that she would be a Liyue character)