Got some super summaries right here not gonna explain them just gonna leave them here

A recently graduated, wonderful senior who saved Tomoko's soul through kindness and protects her from the shadows
Beautiful, loving old friend anxious about keeping friendships
A seemingly normal but overly attached female cousin
An old nemesis as awkward as she is, with a barely restrained craving for Tomoko's brother's dick
A kind, tolerant big sister to the world
An apparently independent and assured girl who actually has low self-esteem and only cares about being with her three cherished friends
A juvenile delinquent without malice and with a not-so-secret passion for absurd moe
A yandere, probably lesbian
A cheerful aspiring voice actress who sees Tomoko as a likable and admirable lab animal

Tell me more about this…expanded cast.