Chara, also known as the first human or the fallen human, is the first human to fall into the Underground. Chara is also the fallen human that the player names at the start of the game, and not the controllable character who is played throughout the entirety of Undertale.

Chara is not seen much in the game, but when they are, they often have a very calm tone. However, something is always off about them, something eerie or unsettling.