Crimson Trance (Black Butler)

Gwen Sutcliff is a female shinigami and twin sister of Grell Sutcliff. Tailing him as he rushes to aid another woman in red, she finds, Ciel Phantomhive. Along with his demonic shadow. Sebastian Michaelis. Lightning strikes between the two supernaturals. Killer glares and threatening auras are exchanged. She collides with the butler in this story and soon, she finds it that maybe her respect has been shifting into something different....

Unedited. (Seriously, there are a lot of errors that I intend to fix)