BRL-A is an umbrella-bot aboard the Axiom. Due to the lack of rain, most, if not all, BRL-A bots are designed mainly as shade umbrellas.
The reject BRL-A has a tendency to open its canopy too far, but his umbrella is thick enough to deflect lasers while he escapes with the other dysfunctional robots with EVE.
WALL•E: The Video Game
In the video game, he can also be bouncy for WALL•E to land on.