Incarceron ~ Catherine Fisher

In Incarceron, Finn led a very hard life. In this bleak world, he is a very rare kind. He is cell-born which means he showed up in a cell with no memories of anything. He was in there for who knows how long and finally he saw a door and opened it. He eventually found his way to where he is now, with his oathbrother.They try to survive. He goes on and adventure trying to get out of Incarceron with his oathbrother, his Sapient, and his servant. He starts as a liar, a person who does stuff only to help himself. Like in the very first chapter he plays the sympathy of a woman just The Comitatus can raid their trucks. This is when Finn was "tied down" on a track to fool the Civicry.

"'No! Please! Please get me up.' They were silent and no one moved, so he took a breath and said tightly, "The Scum raided our Wing. They killed me father and they left me like this for anyone who passed.' He tried to ease the agony in his chest, clenching his fingers on the rusty chain. ' Please. I'm begging you.'"
"Finn moved. He flung the man with the cutters back, Kicked the false bolt off, and wriggled out of the chains."

Finn was pretending to be trapped the whole time so the Civicry would stop so the Comitatus could raid the trucks. Finn does chang throughout the book. While they are trying to escape Finn stops to save one of the servants from the guards that are trying to stop them. He then takes her with them to escape.

"In the uproar and crashing alarns and falling steel he looked back and the eyes of the leprous slave watched him. But it was the Maistra's eues he saw, her voice that spoke inside his mind.
I will never dare show kindness to a stranger again.
Instantly he stooped, hauled the creature onto his back, and climbed."

As you see, Finn felt the guilt about the Maestra's death and decide to save one of the slaves lives and take her with them to the Outside.