Legion Child

Legion children (simply called "child" in-game) are characters living in The Fort in 2281.

Background
They are children trained by their instructor to become legionaries. They run up and down the hill leading to The Fort's entrance to get in shape for future fights.

Other interactions
They can't be engaged in conversation and only say a few generic lines.

Appearances
Legion children appear in Fallout: New Vegas, and are mentioned by Ranger Andy.