Andrea Quill

Miss Quill was the last of the Quill.

Personality
Miss Quill was a blunt and sharp tongued teacher. In class, she was blunt and condescending towards her students. She broke Charlie's phone when he attempted to internet search pop culture references, and mocked April when she tried to intervene. (TV: For Tonight We Might Die)

History
She was a freedom fighter on her home world Rhodia. When the Rhodians defeated her species, Miss Quill was enslaved by the Rhodian prince Charlie before the Shadow Kin arrived. She and Charlie were rescued from there by the Twelfth Doctor, in the midst of the war. She was brought to Coal Hill Academy in 2016, together with Charlie, where she posed as a teacher from Sheffield.

Miss Quill continued to live with Charlie who confronted her about Kevin's supposed disappearance. At night in the school she hid with a student named Kevin from a Shadow Kin that materialised. Unable to use a weapon on the creature due to the terms of her enslavement to Charlie, she ordered Kevin to do it. The weapon killed both him and the Shadow Kin. (TV: For Tonight We Might Die)