What a weird way for her to baby-speak-slur "ones". Rather than keeping the softer O of ones (kinda like "wa" in "one"/"wan"), she uses a hard O and says "onche" (and the harder/more guttural ch sound instead of sh). Unsure if the e is silent, but I would assume it is spoken, considering the letters before it (though quiche has a silent e, that is a loanword, while this is not).
edit: that map of the city, am I wrong in ballparking it at less than 2000 buildings? Assuming its old-school where several generations live together, and lots of kids, I would be guessing at less than 100k (I have touble imagining more than 50 ppl in every house on average)? Thats a really small capital city, particularly as the world has magic. Feels like her comment about many ppl living in the town is a bit off, as iirc, wasn't she reincarnated from earth?