I've only seen a small handful of episodes of the show she is based on, maybe would make sense in her backstory but seems a bit of an unusual choice for her to live with a preexisting family unit without seeming to have any relationship to them, up to you what you do with your own ocs though of course, I respect that. As a personal preference I'm usually a bit pickier with human ocs (boring furry here, im sorry), child characters as well I rarely find as interesting admittedly, most of the time. I enjoy her colour scheme though, with the pink clothes and brown hair, but overall she just isn't really to my tastes personally
Rate Toadmire p they are a pony fursona..ponysona of sorts based on mlp. they have a reference more true to the show's style here

all is by me
In short they are a socially inept recluse residing in an old caravan parked within farmland alongside a small menagerie of animals they keep. They stand tall as to make up for their entirely unimpressive height, and wear a rather blank expression suggesting a perpetual absence, and have a habit of unconscious fidgeting, and the twitching of extremities. they often have in their mind becoming something of an excellent magician ( due to the insecurity of the fragility of their pony-shaped vessel, often failing where the need of practice begins and possess only fairly average abilities for a unicorn