District 12 Plot

So I have this character named Cassandra and so far she hasn't participated in any threads. She lives at the border of the town and the Seam, and her beloved Grandmother is dying. Her mother ran away with her husband's cousin, who killed her father on one stormy night - and she saw all of it on a pay-per-view live view, broadcasting right in front of her through her window. She has friends, but she's personally closed-off and never really shares anything. She's mostly seen hanging around her willow tree by the Meadow, either reading a book, writing somethanggg, singing in hopes of a mockingjay repeating it back but mockingjays never really get close to the fence, or climbing the tree. She's very much interested in the arts, particularly painting, theatre and ballet.

But let's get to business - her Grandmother is dying and she has nowhere to go. Until she saw her mothaaa (NPC character). I have still yet to figure that out on where and how they met but yeah, they met. Somehow her mother manages to convince her to live in with her and her husband (who is Cassandra's uncle - awkward) who lives at the town. I don't know what to do with her dying grandma yet, but I'll figure it out. And on the way she meets a girl probably around her age, who is this total female dog on her. AND SO I PRESENT THE PREDICTABLE PLOT TWIST(?): That girl is her stepsister. Say wut. Can you say Stairway to Heaven? Maybe we'll also throw in a stepbrother and another stepsister but who knows. And since she can afford it, probably attend dance class or theatre class or painting class if there's something like that in D12.

So basically...

Some Seam friends? Someone who she suddenly sees at the willow tree?

Someone to play her stepsisters (maybe twins? seventeen years old) and a stepbrother (eighteen years old). EDIT: Preferably specially-made for this role.

Someone who she meets at dance/theater/painting class.

I guess I'm a long-post, slow-paced type of rper unless I feel procrastinating which is everyday. Preferably with someone similar?