Jason Stevens

Jason Stevens was the son of Peter Stevens, a technician who worked in Vault 87.

Background
In the medical records of Vault 87, he is marked as having died for an "undefined/unexplained" reason. Learning that his son was dead, Peter Stevens eventually went insane, claiming to hear 'children's laughter' in the outer tunnels (this might have originated from the Little Lamplighters in the caverns).

Appearances
Jason Stevens does not actually appear in any game, but he is mentioned in the intact files on some of the Vault 87 terminals in Fallout 3.