She could also easily be the doted on sole child of a well off family born with something wrong with her legs. In my experience those born with their disability or acquiring it early in life have a greater percentage of ‘overly chipper’ personalities towards their infirmity than do those who are crippled later in life.
I’ll never forget being in a rehab hospital after losing movement in my legs suddenly and being suicidally depressed about it. I got paired with a gal whose legs didn’t form right when she was born for some group activities. At one point she reached out and smacked me hard to get me out of my bemoaning of what i’d lost. When I looked up she did a wheelie and a circle in her wheelchair and told me “Whats so bad about it? now you’re as awesome as I am, tag you’re it” and then sped down the hall to the room we were headed to.
Bliss kinda reminds me of her – perpetually perky and optimistic and prone to ignoring or just accepting the negatives in such a way as they’re almost non issues unless they make themselves obvious – like not having her chair available.
And back when Bliss first lived Custom fashionable clothes were fairly normal. She’s mentioned OWNING 4 carriages which indicates a family of wealth and It would make sense that she had a personal tailor and seamstress seeing to her every fashion need. Likely a jeweler and a milliner as well as personal maid(s) skilled in hairdressing and applying cosmetics.

I get more of a feeling that she blindly wandered into trouble more than that she was turned over.