Cherry

Cherry is a prostitute living at Dukov's Place in the Capital Wasteland. If the player talks to her about Dukov, the player can convince her to follow him/her to Rivet City. If the player does this successfully (Fast travel is advised), he/she will be given good Karma. She stops on the bridge to Rivet City and thanks you.

Beware: If the player offers to take her to Rivet City, but later in the conversation balks, he/she will forever lose the opportunity.

Cherry can also retrieve Dukov's key for you if you are doing the You Gotta Shoot 'Em in the Head quest.

There is reported that there are ways you can keep Cherry with you forever. First pass the speech challenge to get her to team with you then leave Dukov's house. Later tell her to hold outside and go back to kill Dukov (not sure if you need to handle the Fantasia or not). After that you tell Cherry Dukov is dead and she will not leave your team anymore.

Note: If you kill Dukov and/or (?) Fantasia with Cherry right outside the door she will be "fleeing" (crouching with hands over head) when you return to her and she will not talk to you. This may not happen everytime but it did happen once. It is safer to take her to your house (or somewhere safe?) that is far away if you want to add her to your group. She then will indeed acknowledge Dukov's death and ask to join your team (even if you have 3 companions already (it is possible to get Jericho, Clover and Charon)...although there does not seem to be a way to give her any weapons or armor, she will stay at your apartment if you ask her to "Wait here.").