I've decided to use nicknames for characters instead of initials, since it makes it more fun that way, and slightly less obvious. Below is the list of nicknames I'll be usings for the characters for your own reference (the characters don't know who corresponds to whom but she'll make it somewhat obvious without being too blunt).
Zach - Sparky June – Ice Queen Bonnie – Bicycle Frank – Hulk Abigail – Virgin Mary Sarah – Barfy Nick – Flipper Dennis – Houdini Scott – Lifetime Movie Eden – Kitty Cat Paul – Golden Boy Diana – Golden Girl Lucas – Phantom (of the Opera) David – Merlot Evan – Speedy Gonzalez Darcy – Voldemort Ariella - Little Mermaid Noelle – Judge Judy Cait – Punching Bag Cora – Little Red Riding Hood Sammy – Clark Kent Lou – Miss Jimmy Olsen Lennon – Pretty Boy Maggie – Coco Chanel Liam – House Dr. Livingstone – Dr. McSteamy
Let me know if I've forgotten any character and I'll get on that ASAP.