NLT Media describe The Genesis Order as below:
"Experience the world of North Santiva, a bustling city filled with beautiful women, creepy locations, and the epicenter of mysterious events. Take control of Detective Canmore as you meet a diverse cast, uncover clues, and solve puzzles that bring you ever closer to discovering the truth about the Genesis Order while weaving a web of sexual relationships as you meet 13 sexy babes along your journey."
Only 12 female characters interact with the MC in North Santiva (Melissa, Andrea, Ella, Heather, Erica, Judy, Nellie, Chloe, Hannah, Carol, Lillian, Kimberley) so who do you reckon number 13 is?

Since Diana, Madalyn and Tasha are guest actors, who will not be active with the MC in the current game, unless a new female character gets introduced number 13 must be Arianna of course.

Personally I'll be more than delighted if I meet Aunt Sara

someplace before the game ends at the end of this year and hope that Santa will deliver it to me as a Christmas present.