Marcella

 is one of the inhabitants of Point Lookout in the year 2277.

Background
She is a Christian Missionary from the Abbey of the Road who has set up shop east of the Pier in the Disaster Relief Outpost.

Her terminal mentions her travel east from the Abbey to the Commonwealth. From there, she took the Duchess Gambit south to Rivet City where she met up with Father Clifford before finally arriving at Point Lookout.

Related quest: The Dark Heart of Blackhall
This quest will be initiated when the Lone Wanderer encounters Marcella upon exiting Blackhall Manor.

Appearances
appears only in the Fallout 3 add-on Point Lookout.