Joe Kielty, a young Irishman from County Mayo, is a member of Willie’s company in the British Army. His cousin, Joe McNulty, dies in the gas attack near St. Julian, but Joe Kielty survives and continues on in the Royal Dublin Fusiliers throughout the war. Joe Kielty is a strong soldier and a champion Irish dancer. He’s gentle, kind, and brave, and his calm demeanor often reassures Willie and his other friends in times of danger. At the end of the novel, he helps Christy Moran bury Willie.