Their savior
That day when she had invaded his pack lands he knew true despair, when the howls of fighting rang out. Living in the wilds where food had become scarce, their territory smaller than the average wolf pack, and adding to the fact they were being hunted by the humans were already pressuring enough to survive. They felt fear, felt despair, losing hope, looking at their shadow, hoping that they could live a little longer.
If their alpha at the time had only cared more, they would have never drawn the attention of the humans when they stole their animals alerting them to their presence.
Kagin had lost his mate who had decided to defend their territory foolishly. Even though she and him were not close, they respected each other.
The mate had been killed around the time the Selene-alpha had taken over, but he accepted it.
These things are normal even though his hearts hurt at that time. His pup was still young and the only reminder he had of his first mate.