Selfish and cynical
At the beginning of the game, Jake is a selfish, money-hungry mercenary who is cynical about the world. He's also unskilled when he first joins the Edonian Liberation Army, but is quickly trained and hardened into a soldier.
Untrusting
Jake's history as a mercenary includes being sold out by a trainer who had his unit killed, leaving Jake deeply untrusting of people.
Helpful
Jake's relationship with Sherry Birkin, another character in the game, helps him to push through , 