App input here
I've been mulling over these questions and though I have many approaches that I could adopt, most of them require more than a paragraph. So I'll try my best to condense one of many ideas:Just about any level of nobility is open to anyone, but if you were thinking of creating one of the Great Noble Houses you'd probably want to talk to Justin and the others. Other than that there's really nothing holding you back from making a noble.
From your posts I don't see a ton of reasons why she would interact with others, or they her. Beyond her swordsmanship, what might bring her into conflict or cooperation with the other characters? You say she'll challenge her upbringing in order to establish new connections, but how and why?
Having a character almost literally born to be a Shinigami with high expectations placed upon her is nice approach. It definitely leaves a lot of wiggle room for development and growth.
As an unseated Shinigami there's a pretty high chance she's been sucked into the chaos of the Black Death (depending on her Division). How do you think the current events have impacted her? As someone who prides herself in swordplay, I can see this as either something she sees as the perfect opportunity to show off her stuff, or as someone who's intimidated when push comes to shove.
I'm also curious if she has any greater ambitions than just swordplay. Does she want to climb the ranks, for example? Does she have any strong relationships with her peers? Though it wasn't outright said, the way she was born with the expectation to be a Shinigami somewhat implies that she's from Nobility. Is that intentional?