Madison Li

Doctor  is a 48-year old scientist working on food conditioning experiments in Rivet City, together with Janice Kaplinski and Anna Holt. She used to be part of the group of scientists that worked with James on Project Purity before the birth of the Lone Wanderer. Despite James' renewed efforts she remains skeptical of the project. Dr. Li is the first distinct face that the Player sees during the Lone Wanderer's birth scene.

The Lone Wanderer is sent to Dr. Li by Three Dog after repairing his broadcast dish (or talking his/her way out of it). Li recognized the Lone Wanderer on sight and mentioned that James already left for the Jefferson Memorial in the hopes of finishing Project Purity; he asked for her help but she refused.

After James returned to Rivet City, it didn't take a long time to convince her into continuing the work that was interrupted 19 years ago. She was outside the control room when the Enclave arrived and witnessed James's death. She was deeply shaken by it and managed to convince the Lone Wanderer into helping the remaining scientists escape into the tunnels leading to the Citadel, Enclave in pursuit. When one of the Citadel's guards attempted to turn her away, she yelled into the intercom at the gate, prompting Lyons to let them inside. After explaining the situation to him, Lyons allowed them to stay.

Background
According to the Fallout 3 Official Game Guide, she had romantic feelings for the player's father, but hid her feelings to respect his marriage with another scientist, Catherine. When James left, she felt betrayed.

Broken Steel
During the events of Broken Steel the Lone Wanderer is told that she proceeded to leave the Capital Wasteland and travel to the Commonwealth to pursue other scientific purposes, allegedly because she could not stand the Brotherhood Scribes' involvement in Project Purity. Since there are currently no plans for an add-on to journey to the Commonwealth, it's highly possible you'll never see her again.

Appearances
Madison Li only appears in Fallout 3.

Related Quests

 * Scientific Pursuits
 * The Waters of Life

Notable loot
It is possible to get Dr. Li's uniform from reverse pickpocketing better armor onto her. Such as Power Armor, Combat Armor, even the various types of Raider Armor. You may want to consider saving before you try this as she will catch you most of the time.