Chief Petty Officer (CPO) Franklin Mendez is the non-biological father of all the Spartans (or is he?). He's been very busy (rofl). He is also the trainer/criminal behind training the Spartans on Reach. Yeah I read the Halo books, got a problem with it? He used a bunch of other trainers to bully the children into Spartans during years of brutal boot camp that was so damn brutal it's now illegal. Many people thought he had sex with Dr. Halsey, but he actually hates her since she complains in his ear all the time. He's also really old: a thousand years old or something like that. He only hanged around on Reach 'till the Covenant came and glassed it. Then he disappeared... along with a group of young Spartans.