I HAVE SO MANY I have such a weakness for nobles/royalties/upper class in general, most likely because I come from a very much opposite household so it's nice to get in the shoes of someone else.
Claude here is from a higher class family, not from the very top but high enough to be considered rich and influencial within the upper class circles. Claude is kind of hard to pinpoint because he is very calculating and careful with his actions most of the time and he normally let's people see what he wants them to see about him. He is simultaneously really loved by others of his school due to his looks and witty and strong personality, but at the same time he is also known as fickle, cold and unpredictable at times. He is for a vn so I can't really go in depth about him but yeah he is generally polite and not like downright nasty or anything but people know Claude is intelligent and calculating in his actions.
Walter is also from a upper class family, not as high as Claude though. Walter is all about words and speaking and he is very articulate and good at talking himself in and out of things + he is very witty and always has something funny and/or witty to say. He can be really merciless though and tends to be kind of cruel to people who who hates or who have done him wrong, but he is generally a really fair dude and doesn't intentionally cause harm to people he cares about. Gossiping is his guilty pleasure and he loves to share drama and be informed about what's going on, and he knows a little about everyone at school. His other hobbies are playing piano and trash talking about Claude.
Alois was ranked count when he was still alive, but I focus on the times when he is a ghost wandering around his mansion. He is very melancholic by nature and prefers observing people over actively encaging into conversations or socializing, and he is known to be kind of stiff and overly polite especially around new people. He gets along with others easily though and he is overall really well-mannered and kind and probably doesn't even KNOW how to insult people.
Tiera was adopted to an upper class family as they were his only living relatives capable of taking an orphan child in. Having grown up in the north to a simpe hunter family Tiera found it really difficult to get adjusted to the life of nobles and he honestly never gets used to it. Thankfully he is able to roam the forests and hunt most of his time since he has other siblings too to take over the family name + he is respected and renowed especially for his spear skills. Tiera is very silent and prefers to be alone and finds it very hard to stay in one place for long. He enjoys nature the most and can get talkative when the topic switches to hunting/trapping/fishing/surviving in the nature. He is very loving and caring especially towards his adopted family and an excellent listener!
Rosemarie is something like... the lowest possible rank to be considered upper class, I guess? She has a disposition of a leader and usually drags people with her into all sort of adventures (and misadventures) and she has a very rebellious nature. She is super passionate about the topics of equality and freedom of speech and wishes to become involved with both politics and content creating (mostly writing + she prefers being predominantly an artist over a politician as she finds that too restricting). Rosemarie is really confident and kind to people, but can also be too harsh and rough around them, and is also very, very impulsiveand sometimes her friends have to hold her back (sometimes even physically!)
Marion is from a very typical upper class family. His blood pressure issues have made him very weak physically and he can come across as a little odd to people as he grew up surrounded by adults rather than his peers + he was ostriched by other boys for his meek and feminine disposition. He is meek, careful and very polite around people as is expected of him, but he also has a lot of frustration and insecurities in him as a result of his childood + the fact he has trouble really expressing his feelings to other people. He was a renowed violinist but against all odds chose the life of travel to find his first love andthe person who taught him how to express himself through his music.
ghh I have more but I'm too tired to type them all up + I tried to avoid straight up royalties here since I consider them like... next level entirely