Meryl = My field partner and girlfriend, Meryl Silverburgh. She's a damn fine soldier and a damn fine woman.
Otacon = My (Sometimes annoying) tech support guy, Hal Emmerich. That's not doing him justice, he designed most of the equipment we use in the field and can pretty much hack anything with a password. The annoying part comes from his codename, "Otacon". It stands for Otaku Convention, and Otaku is Japanese for "Obsessed". And he IS obsessed. Obsessed with his sister, obsessed with his comic books, TV shows, video games and action figures. Personally I can't see the appeal in most of it.