Banshee joins the second group of X-Men. After a mission at Krakoa, Banshee remains with the "New X-Men". Banshee accompanies the team on many different missions and is present for several key moments in the X-Men's history, including the first death of an X-Man, Thunderbird. He is also a key player during the first appearance of the Phoenix and the team's first encounter with the Shi'ar. While with the X-Men, he falls in love with Xavier's ex-girlfriend, Dr. Moira MacTaggert. Alongside the X-Men, he fights his cousin Black Tom Cassidy and the Juggernaut. Given his age, he frequently acts as a confidant for both Xavier and Cyclops, eventually convincing Cyclops to change his leadership style to better suit the older, more experienced second team of X-Men.