Danny Pink

Rupert "Danny" Pink was a teacher at Coal Hill School, where he taught mathematics and established the Coal Hill Cadet Squad at the school.

Biography
Danny lived in a children's home in Gloucestershire for some time when he was young. There he was visited by an unknown being which triggers nightmares in children whilst he was in bed, and he met the Twelfth Doctor and Clara Oswald, but his mind was scrambled by the former to prevent remembrance of this encounter.

Pink joined the army where he performed a number of humanitarian tasks besides that usual military work. (TV: Listen) Following his exit from the army, he would become distressed when mention was made as him having killed while a soldier.

He was introduced to Clara Oswald by Mr Armitage. She invited him to join her at a colleague's event after work that day, which he initially declined — an act he immediately regretted. While reviewing this awkward moment to himself, Clara overheard him. Although this further embarrassed him, he gratefully accepted her offer to grab a drink together. (TV: Into the Dalek)