Acrux was once a lone wanderer after he left his previous pack on his own accord. From then on, he fended, for himself. Living in the mountains proved to be quite grueling and tiresome, especially alone. Acrux would go for many nights hungry and restless. Constantly paranoid about when or what was going to get him, he soon got weaker and weaker.
Once a blizzard hit, Acrux thought he'd be a goner. He laid in the snow and waited for it to form his new grave. That was, until a limping Cassini found him. Without a word, she grabbed Acrux by the scruff and dragged him through the snow and into a nearby cave, which would soon become his new home. There, the two spent the night, waiting for the storm to end.
Till this day, he thanks her for saving his life, even if it is in a begrudging manner. He is the first member to join Blue Stone Run, and would go anywhere with Cassini, even if it would cost his life again.