No one has actual prove of what his 'contract' sais. His contract starts when he is summoned and ends basicly when things get bad in his eye's. He DOES run away but its not because he's scared but more because theres no more point in being there. He dousn't need to endanger himself since that the war is already lost at that point.m pretty sure i read near the beggining of the thread that people say that yuber always runs away, when under heat, but i recall in S2, he left, because, hes contract ended, meaning he didnt have to fight in the war, so he left, and in S1, im pretty sure windy went missing after the fall of barbarossa, which i recall was the time that yuber and pesmerga had there duel, after that, since windy is gone, im sure yubers contract with her was up, so he left, i havent played suikoden 3 so im not comenting on that, anyway my point is, yuber is loyal, and im just clearing that up, cos i didnt like the coments made about him.
The reason why Yuber left in 2 is because of the above. When he left in S3 it was ALSO because his contract was up but the fact that he was going to get killed if he didn't teleport was offcourse a more obvious reason.
In other words: Yuber is absolutely everything exept loyal. He will do his job but only to the point that it won't actually endanger himself. The moment people like Pesmerga get to close to him he will most likely run away.
However I do think that Yuber was slightly loyal to Windy. But this was because with her he could do all sorts of destructive things and it wasn't really a contract.
Anyway I got a question cause I can't remember ti anymore: Who summons Yuber for Windy? Did Windy summon him or did a Silverburg do it?