Some more human characters for Transformers 2 have been revealed, but not confirmed. Beware there are potential spoilers. You have been warned.

Head of Sector 7
60s, female, aggressive and no-nonsense leader of a secret government agency & speaks with sass;
NASA Shuttle Pilot
Early 30s, male, Caucasian, African-American, Asian or East Indian, intelligent and sarcastic. Most gifted pilot NASA’s ever had;

Murray
40s, a NASA IT tech, spastic and brilliant, he’s capable of breaking down and reassembling the world’s most complex computer;

Sam’s Ex-Girlfriend
Late Teens-Early 20s, cute and cerebral, a total arty girl that leads her own punk band;

Eric Witwicky
Early 30s, Caucasian, Sam’s much older brother. A stiff and pedantic personal injury attorney. Loves money and having more of it than everyone else. Supporting Lead;

Funeral Director
50s, male, spacey yet kind-hearted funeral director that buries Simmons. Can’t help but put his foot in his mouth every chance he gets;

MJ
19-25, Sam’s RA. Third year college student studying bio-chem. Stuffy and stiff lipped, he’s a hater of all things fun;

President of Uganda
Meets with US Special Forces to give them access to his land;

Leroy Mason
Late 30s-Early 40s, super tall ex-basketball player turned business man. Bumps into Sam to give him advice;

Basketball Player
19-25, tall, well built athlete who will be asked to participate in scrimmage basketball game.