Baby is the name given to an infamous monster which appears to be an extremely large, mutant human foetus. It makes sounds like a new-born baby, albeit slightly warped.
The creature slowly makes its way towards
Ethan Winters by crawling, saying things like "Mama", "Dada" and "Yummy" - if it manages to reach him, it will stuff him into its large mouth and devour him. If it finds Ethan, it makes laughing sounds and general baby gurgling. Conversely, when it loses track of Ethan or cannot find him, it becomes audibly frustrated and upset, including crying and sulking. However, it is very slow and relatively easy to avoid.
It appears in
Donna Beneviento's home and is thought to be a hallucination imagined by Ethan, after he inadvertently inhaled a form of Mold spores. It is assumed that the creature appears due to Ethan constantly worrying about his recently born daughter, Rose Winters.
In the game, the Baby is a heavily scripted encounter. It will basically be activated and deactivated at fixed points when certain conditions are met. For example, if Ethan hides in the wardrobe or under the bed, it is not possible for the Baby to 'find' him. Thus, it is quite easy to manipulate as it follows a set path. It has a reputation for being one of the most creepy encounters in the Resident Evil series.