You may be looking for Zsofia Ekler.

Zs. K. Ekler was on Coal Hill School's list of the dead. (TV: For Tonight We Might Die) They died sometime before April 1963. (PROSE: Time and Relative)

Behind the scenes[]

Given the letter Zs in their first name, and their surname, Ekler was, without a doubt, Hungarian.

Zsofia Ekler is a set designer on Doctor Who, and a draughtsperson on Class. The name on the board is in reference to her.

In The Woman Who Fell to Earth, an episode of series 11 Doctor Who, "Zsof's World Part 6 of 20 | Cake" is a YouTube video uploaded by the channel "Z Ekks", another reference to Zsofia Ekler.