itch.io

Go to the forest park, she should be around there, along the same path you use to scare away the fairies when they're tickling rinny

Forest park is actually just one possibility, out of a few; she could also be in jail in the city, or in Transylvania in the upper right part of town. Possibly one or two other places as well, can't say for sure, but those are the only three I've gotten; it's random.