John O'Donnell is the father of Wolf O'Donnell, a Mobian wolf, and former leader of the Star Wolf Team. He was friends with Boba Fett's father, Jango Fett, and was one of the greatest bountry hunters of Galaxia in his time, rivaled by Jango and many other hunters.
In Monty's Galactic Days, when his team was hired by Tallest Miyuki to hunt down and destroy Monty and his friends. They first ambushed Monty's team as they came out of Planet Dagobah, being quickly defeated. When they made it back to the base, he and Cad Bane had an argument, which nearly resulted in a fight. The Old Star Wolf Team attacked Monty's team during the Invasion of Irk, in which John engaged Monty in a battle, but was killed by Tallest Miyuki via lightsaber through the chest. Since Miyuki did it from another room, Wolf thought Monty killed him and went into a mental breakdown, just like Boba Fett when Mace killed his father. And just like Boba, Wolf took John's place as leader of the Star Wolf Team.
John is Wolf's father. The two seem to have a close bond. They are similar to Boba and Jango Fett.
Cad Bane doesn't seem to like John as a leader. Bane thinks he should've been leader.
Aurra is a member of John's team, but not much is known of their relationship. Aurra usually breaks him and Bane up when they fight.
After Boba's father died, John apparently decided to look after him, adding him to the Star Wolf Team.
John is a ruthless bounty hunter, and is also quite defensive of his leadership. However, he seems to have a rather kinder side, which he shows to his son and Boba Fett.