Martha Rastello

 is in 2161.

Background
The master water merchant is apparantly the administrative head of the water merchants in The Hub.

Interactions with the player character
She will tell the player that there is a water chip in Necropolis. Also, if you are running out of time to retrieve the water chip, for 2000 caps she will commision a caravan of water merchants to deliver water to the vault.

Appearances
appears in the original Fallout.