Susan Pevensie was a fictional character who appeared in books about a place called Narnia. Matteusz Andrzejewski believed that the books' author really disliked Susan, not only because she was not allowed into Heaven because she wore make-up, but also because she overheard a friend in a moment of weakness saying not very nice things about Susan, ruining their friendship. (TV: Detained)
Behind the scenes
The character's surname and the name of the books she appears in their author is not specified in Detained; however, the mention of Narnia, goats and witches in the episode is a clear reference to Susan Pevensie.