Serral (real name Joona Sotala) is a professional StarCraft II zerg player from Finland. He was the champion of the 2018 WCS Tournament, and was the first non-Korean player to win a championship.
Serral's portrait was added as part of the 2017 WCS Portrait Pack. 2018 WCS Portrait Pack, and the 2019 WCS Portrait Pack.
On the Simulant console, if the player manages to do 1000 actions-per-minute, the APM counter will read "5-ERR-4L," or Serral.
Liquipedia - Serral