Quinn, Marigold, and her twin, Delilah, were raised by an incredibly abusive alcoholic, and his codependent wife, quick to ignore her three girls. The younger two tended to stick together, being fraternal twins. The eldest, who had two years on them, Quinn, was distant and didn't spend much time at home as she got older- being more social than the twins, she found it easy to get out of the house, and left at age seventeen, never seen again. Marigold was the next to leave, the following year- running away with the money in a wallet she found, emptying someone's atm card on a bus ride to Evergreen. The youngest, Delilah, stayed until she finished high school, and went off to college.
However, I'd like for the three to reunite somehow, now that their father has died due to his drinking- driving himself into a tree while drunk. Delilah is the only one who knows this so far- Quinn and Marigold are in the dark, but both would literally skip and dance on his grave.
The faces are completely negotiable. What they've done since leaving home is up to you. Why they choose to sign up for The Vow is also your own reasoning. All that matters is that they've decided to start looking for each other- Marigold has serious regrets surrounding Delilah, and wishes she had gotten to know Quinn before she left.