Becoming pack leader was a complete accident for Triforce. He was always impulsive and prone to getting lost, so he was surprised when his pack leader sent him off to his first scouting gig alone. He got caught in a storm and wandered off too far to find home, and decided he might as well keep going to see where life takes him.
His best friend is a dark wolf named Santana, who got the boot from his last pack due to his inability to cooperate with his hunting party. His arrogance cost them way too many hunts since he always thought he knew what was best. Maybe he did, maybe he was full of himself, but the pack was done with him. He met Triforce while accidently tracking the same prey. Triforce didn't mind the company and Santana loved being the center of attention, which Triforce didn't mind giving him.
They went on together and slowly collected a pack of misfits, each with their own flaws that Triforce has found a way to put to good use. You'd think with Santana's arrogance that he'd want to be pack leader, but given Triforce's ability to lead without hesitation, he decided to let the khaki wolf call the shots. As long as Santana gets to lead the hunting party, he's happy to protect the care-free leader with his life.