Clover

Clover is a joinable NPC in Fallout 3. She can be found in the town of Paradise Falls. She seems to be armed with a Chinese Officer's Sword and a Sawed-Off Shotgun. She is a slave working for Eulogy. When you tell him you're looking for a bodyguard he suggests taking her. You're required to be evil, and Eulogy will sell her for 1000 caps, you can bring this down to 500 caps if you use speech. She can wear Power Armor. Her dress, sword (Clover's cleaver?), and sawed-off shotgun is also not in her trade menu.

Eulogy mentions that she is a bit crazy and will do anything for the person that is holding her leash. As she mentions herself.(see Quotes)

Quotes
"Can I do anything for you? Or to you.."