Frederick

Frederick is one of Roofus' sons. He is found at the end of The Bad Place, within a small room with a single source of light.

Frederick is the only baby that needs rescuing in the level he is found in and is also the last baby to be rescued overall.

How to Rescue
Frederick can be rescued after playing through the entirety of The Bad Place. You will end up as Roofus once you locate him so locating the appropriate Telepoint nor using his special skill is required.

He waits patiently on a podium.

Trivia

 * According to the game files, Frederick was originally to have a minor speaking role, where he tells his father that his mother is no longer there.
 * He is the only baby you rescue whilst in an alternate outfit.