Press the flaggy.
Shyren is the FIRST major character that the protagonist encounters in Switchtale.Shyren serves as the main antagonist for the majority of the game, specifically the Neutral and True Pacifist routes. He provides an introduction to the mechanics of encounters by sharing "friendliness notes," which are actually harmful notets, revealing his philosophy of "KILL or BE KILLED." (Shyren is a girl in undertale but a boy in Switchtale you will soon learn why)