Pupil Slicer formed after Kate Davies,[a] having discovered heavy music while at university in London, posted in an online forum for musicians, where they met drummer Josh Andrews. Davies and Andrews were involved in multiple projects together before Pupil Slicer, including a black metal band. Luke Fabian later joined them as bassist, filling a position for a gig at short notice. Andrews and Fabian introduced Davies to bands such as Botch, The Dillinger Escape Plan and Code Orange, which would go on to become major influences for Pupil Slicer.[3][4]
Davies began writing Pupil Slicer's first full-length album, Mirrors, in 2018.[3] After the band's original vocalist left a short while into the project, Davies took over vocals.[4][5]Mirrors was released in 2021, after the band signed with Prosthetic Records in 2020, and was described as containing elements of powerviolence, mathcore and grind.[6][7][8] Pupil Slicer supported a tour with Rolo Tomassi and Heriot in 2022, as well as performing at ArcTanGent Festival and Bloodstock.[9][10][11][12]
In November 2023, Pupil Slicer announced Luke Fabian's departure from the band, along with their live guitarist Alex Brown. The split with Fabian was mutual, with the band stating "working together professionally is something we can no longer continue with".[17]
