|The following is based on information from Van Buren design documents and is not canon.|
Marie has some potential for science, which means the Daughters would want her on their side instead of independent. If you're allied with the daughters, you can arrange to have Marie join them voluntarily (which requires talking to Marie (to make her understand that the Daughters will train her as well as Teacher could) and possibly her father, or kidnap her and deliver her into their custody. Either way, it requires talking to Merrin, and afterwards Marie won't be in the Blackfoot town any more, which will ensadden the Hangdogs and especially her father.
Character type completion breakdown
- CombatBoy - Will have the easiest time subduing a 12-year-old girl if she doesn't want to go.
- ScienceBoy - Can drug her into unconsciousness, then take her to the meeting-place with Merrin's agent.
- DiploBoy - Can talk to Marie, Grins A Lot, and Merrin and get this all worked out and everyone happy with the situation.