Here is my spiritual successor to Senran Kagura and Valkyrie Drive: Ubermutter, meaning "Supreme Mother" in German. It tells of at least 9-13 fatherless families that have been deported to a tropical island due to having contacted a rare virus that allows them to transform into Magical Girl-like forms. These forms can only activate when the infected mother has an incestuous sexual intercourse with her own son or daughter. Such an intercourse is called an Oedipus Contract. The quarantined families currently participating in the Oedipus Games are as follows:

1. Aki Himawari (Son: Fuyuki, Daughter: Natsume), Japan (Theme: Mecha, Fairy)
2. Francine Kafka (Son: Hopper), Germany (Theme: Insect)
3. Katalina Montenegro (Son: Alfonso), Brazil (Theme: Birds)
4. Jin Ming (Daughter: Mei), China (Theme: Dragon)
5. Ayame Hokage (Daughter: Honoka), Japan (Theme: Ninja)
6. Brunhilde Anders (Son: Kristoff), Sweden (Theme: Valkyrie)
7. Tina Nashton (Son: Clay), United States (Theme: Wild West)
8. Marie DuBois (Daughter: Helena), France (Theme: Opera)
9. Isabella Sanchez (Daughter: Coco), Mexico (Theme: Lucha Libre)

UPDATE:

And here are the Season One DLC families also participating in the Oedipus Games:

1. Svetlana Bosconovitch (Daughter: Sophia), Russia (Theme: Vampire)
2. Madihah Assan (Son: Kareem), Saudi Arabia (Theme: Djinn)
3. Emilia Giovanna (Son: Luca), Italy (Theme: Pirate)
4. Kim Bon-Hwa (Daughter: Choon Hee), South Korea (Theme: Kumiho)

UPDATE 2:

Now, here are the Season Two DLC families now participating in the Oedipus Games:

1. Nani Opunui (Daughter: Moana), United States (Theme: Shark)
2. Cassandra Nikos (Daughter: Megara), Greece (Theme: Greek Mythology)
3. Lucina Mac Lir (Son: Cullen), Ireland (Theme: Racer)
4. Aadvika Adama (Son: Vadish), India (Theme: Asura)

And the Season Three DLC families as well:

1. Jenny Lincoln (Daughter: Kiki), United States (Theme: Sports)
2. Valentina Madrigal (Daughter: Manuela), Colombia (Theme: Dinosaurs)
3. Alice Holmes (Son: Oliver), United Kingdom (Theme: Alice in Wonderland)
4. Vidalia Riggs (Son: Jack), Canada (Theme: Music)

UPDATE 3:

And also, here is a Pre-Order bonus DLC Character:

1. Hotaruhime Kanzuki (Son: Taichi, Daughter: Hikari), Japan (Theme: Construction, Medicine)