Lucca left his previous pack when the leader died and everyone else split up. Preferring solitude and peace, Lucca was content with staying by himself. However, he soon found Rowan and he changed his mind. Their love for each other is strong, and Lucca wouldn't go back to being by himself for the world. He has grown used to Rowan's company and is honored to lead his pack with him, even though he'd be perfectly happy to just be with Rowan and not be in a pack.
While his role is breeding and carrying on his family with Rowan, he loves to learn and experiment with herbs and healing, and he also shares responsibilities with Rowan. He doesn't address the pack often and avoids talking if possible, but doesn't hesitate to help those in need.