Xiao Pai Pros: Her gimmick of being bad at everything when her mom is bad at everything (while everything turning out well for her anyway) is pretty funny. Cons: Her gimmick is still...well, a gimmick. Dude, she's like, 13. Verdict: Hard pass. Too young and little characterization.
She's actually older than Lest. At least, that's my recollection.
Dolce Pros: Probably my favorite personality. Quiet, but secretly kind while being a little twisted. Isn't actually mean to people except her dumb ghost friend. Also rocks the top hat. Cons: Her ghost friend sucks. She never shuts up and literally can't be away from Dolce. Verdict: Strong contender. Would be the #1 choice if it weren't for her obnoxious ghost friend.