katherine langford as cassandra "cassie" bridgerton hale (colin's twin)

relationships: edward cullen -- true mate, the rest of the cullen's -- coven/ family, isabella -- enemies, angela weber -- best friend

age: 18 (turned), 198 (in vamp years) 

(a/n: edward is 109)

background: she was on her way home from penelope's when she was attacked by caius, she met carlisle when he saved her/ turned her out of loneliness