What do you think about Peter? He flip flops between his allegiances...and I can't decide if he's trustworthy or not. I think in the end he'll see the light and come through for Tris and the divergent.
Peter operates with whoever gives him the better deal, and I think for the majority of Insurgent he saw the Erudites as the winning side. Not willing to operate with losers, Peter isn't exactly the most stable comrade in the world, but when he is on your side he's quite the asset, explaining why both sides want him.
But Peter does operate on who ever has the better deal and that is saying that Peter is smart and that his actions can be trusted unlike Caleb. With the Erudite they are just as deceitful like Caleb with is like the disgusting thing ever. Because their is only one thing I know is that I can trust Peter over Caleb because of that he didn't intentionally want to portray tris or treat tris like he did. Peter is one of Tris's friends and that he can be trusted more then Caleb. Caleb sided with Jeanine, Max and Eric which deserves a good punch and kick to the face. Other then that, Peter you can trust and Caleb you don't trust.
Yes he did, but he made up for it by saving her in insurgent like she saved him from bullets at the beginning of insurgent. But Tris has got respect for Peter as he will not hurt her in anyway as he knows that if he did Tris will kill him. Caleb is untrustworthy due to he tried to end Tris's life by having her as a testing subject for Jeanine. It is like what the hell.