It was established right away how much of a loner Ottway was, but as he was forced to get to know the other survivors of the plane crash better, he gains respect for them. This comes to its peak at the end of the movie, when a tired and broken Ottway makes a small makeshift gravestone/shrine to all of them with their wallets. And then he adds his own...
Ottway comforting Lewenden about his inevitable death. Doubly so because those words most likely made Talget think of his daughter in his final moments, which was better than being aware of the incoming wolves.
Diaz making peace with Ottway after giving up and sitting down, with the two men sharing a laugh over their first names both being John.
