The Lamb is the protagonist and one of the two playable character in Cult of the Lamb.

Inspired by the use of the lamb throughout religion as a symbol of the holy and noble, the player starts the game as an innocent and powerless sacrificial lamb, about to be offered to a dark and violent deity. But through the game, the lamb's morals twist and corrupt, transforming them from a virtuous creature to a deadly and power-hungry cult leader.

The Lamb appears to be a cute anthropomorphic lamb with grey skin and cream fur. Their eyes are white with black irises and white horizontal pupils. Around their neck is a black collar with a gold bell. This collar also secures their red cloak to their body. The Lamb has lotus colored horn bumps and atop their head is a black crown with a red eye. This crown, known as The Red Crown serves as The Lamb's connection to "The One Who Waits" and grants them access to their supernatural powers. Namely their ability to manifest magical weapons and tools. When channeling their powers, The Lamb's eyes glow red and blood flows from the lower lid.

The Lamb's gender is unknown and ambiguous, although in at least one instance they are referred to as "Them", though this may be due to the crown Lamb wears, which is sapient and technically a separate entity. According to the Game's Twitter, before they were The Lamb, their name was originally Lambert.