Also known as: 知得留先生, 教えてシエル先生
Ciel (Tsukihime) as she appears in instructional segments after bad ends in Tsukihime and its remake. She appears slightly older, closer to the age of a young adult than the teenage Ciel.
One of the inspirations for C.I.E.L (Fate)'s second ascension Ciel-Sensei (Fate).