A skilled melee fighter, Mona suffers from a particularly degenerative skin condition brought about by swimming in the nearby irradiated river.[Non-game 1] Mona will tell the Lone Wanderer that they should go swim in the local river if they want to understand what happened to her.[1]
↑The Lone Wanderer: "Whoa. What happened to you?" Mona: "Go take a swim in the river. You'll find out for yourself, asshole." (Mona's dialogue)
↑Mona: "Saw another run-away down by the shore. Well, most of one, anyway. Think the river monster got the rest of it." (Mona's dialogue)
Non-game
↑Fallout 3 Official Game Guide Game of the Year Edition p.86: "Mona: Sometimes clad in skimpy clothing and a variety of interesting skin disorders, Mona is skilled in the arts of melee combat. She suffers from a particularly disgusting degenerative skin disorder from swimming in the nearby rivers."