Christel Dean
From Tardis Wiki, the free Doctor Who reference
Christel Dean was a friend of Clara Oswald. The two met in teacher's college and kept in 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)
Behind the scenes
The name and appearance of Dean are based on those of Christel Dee, host of The Fan Show.