Manya

Manya is the wife of Nathan. She and Nathan own a house in Megaton and live there. If you ask anybody for the word around town, they will direct you to Manya (Manya's dialogue changes over in-game time?). She will also comment on "how quiet it is now that Nathan is gone" if you kill him (This may happen sometime after he dies).

Manya is one of the oldest residents of Megaton, and as such knows much about the history of the town. As evidenced by a holotape recording she keeps in her home, and by her own admission when you question her on it while carrying out the The Replicated Man quest, Manya is a member of the Railroad (an organization dedicated to protecting and hiding androids escaping their owners).

History
if you ask Manya about this town and how it was built, she will tell you pretty interesting stories if you care. its rather long and surprising how this town started. just listen(for once).