MCF and the Forgotten Sister is an MCF story written by trachie17. In it, Anya reveals that Tracy and Tricia have a younger sister named Annie and they along with the MCF girls must go and find her before Grigori the son of Rasputin finds her.
- Annie Romanov (Debut)
- Seamus Finnigan
- Cedric Diggory
- Sasuke Uchiha
- Nosedive Flashblade
- Anastasia Romanov
- Dimitri Romanov
- Ben Tennyson
- Julie Yamamoto
- Kenny Tennyson
- Doyle Blackwell
- Grigori Rasputin (Debut) (Main Antagonist)
- Mr. and Mrs. Northwest(debut; minor antagonist)
- Pacifica Northwest(debut; minor antagonist)
When Tracy begins to have recurring visions about their mother and father protecting a girl but one day when the MCF find a young girl with no memories of her past. The girls and Tricia send out to help her regain her memories. But that may be a problem when Grigori tries to stop them from achieving that goal.
- MCF Theme to the Tune of Monster High MCF
- Anastasia Prologue (Once Upon A December)-Anya, Young Tracy and Tricia
- Yocheved's Ballad (Prince of Egypt)-Anya and Young Tracy
- Free (Barbie and the Princess and the Pauper)-Tracy and Annie
- Maybe (Annie) (90s Version)-Annie
- Castle On A Cloud (Les Miserables)-Annie
- Master of the House (Les Miserables)-Mr. Northwest, Mrs. Northwest
- More Than A Dream (Cinderella III: A Twist in Time)-Annie
- Naughty (Matilda)-Annie
- Journey to The Past (Anastasia)-Annie
- Bring Her Home (Les Miserables)-Anya
- Once Upon A December (Anastasia)-Annie
- In The Dark Of The Night (Anastasia)-Grigori
- Why Should I Worry? (Oliver and Company)-Tricia
- Stars (Les Miserables)-Grigori
- More Than A Peacock Princess (Disney Princess Enchanted Tales)-Tracy, Tricia and Annie
- To Be A Princess (Barbie and the Princess and the Pauper)-Tracy, Tricia, MCF and Annie
- Paris Holds The Key To Your Heart (Anastasia)-Sophie, Tricia and Cast
- More than A Dream (Reprise) (Cinderella III: A Twist IN Time)-Annie
- On My Own (Les Miserables)-Annie
- Confrontation (Les Miserables)-Grigori, Tracy and Tricia
- Empty Chairs At Empty Tables (Les Miserables)-Tricia
- This story marks the debut of Annie Romanov and Grigori.
- It's revealed that Grigori is the son of Rasputin and Queen Selene and revealed he was hidden from the rest of the world.
- This story will have several references to Anastasia, including Annie and Girgori being like their respective parents.
- This story reveals Pacifica Northwest who will later be Sunset's student is Annie's adopted sister mirroring her older sisters Tracy and Tricia.