Christel Dean

Christel Dean was a friend of Clara Oswald. The two met in teacher's college and kept n touch in the years after. In 2014, Christel got a job at Ravenscaur School which she considered her "dream job".

In September, 2015, Christel was killed by the Sea Devils who were controlling Ravenscaur. (COMIC: Clara Oswald and the School of Death)