That invisible girl (a ghost hunt fan fiction)

The girl in red was very mysterious indeed she lives in the shadow realm by her self till that day she met S.P.R. and who were they investigating why it's the girl in red herself she has long white hair, white eyes, pale skin, ruby red lips, white cat ears and a fluffy white cat tail a long red cloak and a white dress underneath. She becomes friends with S.P.R. but there's all so a twist there's a young earl and his demon butler after her.