Lottie has a really adorable design! I love the mix of the colours and think they go perfectly well together. Her fur patterns are cute and imo very recognizeable; her patterns aren't the usual canine patterns you tend to see (or at least saw in my canine artist days; I'm getting old). I especially love the red nose and red markings under her eyes: they make her look both cute and elegant! In her bio I find it really interesting she only became a noble later and actually didn't know what to do with all that money, because I feel like it'd probably be something a lot people would have to deal with but don't realize? I mean usually in fiction characters perfectly know what they want to do when they're filthy rich as if they had been planning that their entire life.
As a sidenote I also really liked the song you pick for her theme song & I think it really fits her!