Jim and pap.

Pap was hardly a parent. If anything, Pap orphaned his boy. When Pap realized he could get something out of Huck, he took custody and abused him. Jim had a sincerity about him that could not be faked. He loved Huck for who he was. When Jim sees Huck's dead pap on the floating house, he doesn't tell Huck out of concern for him. Jim was loyal to Huck throughout the story. It was a loyalty based on friendship rather than colour or social norms.