Barry Byrne was the son of a WASP aquanaut who was killed while on duty.
After his father was killed on duty, he was taken to the WASP-run orphanage, since his father had been his only living caregiver.
He knew Atlanta Shore, who along with her father Commander Shore, had known his father. Atlanta visited with him right before Christmas, and brought Troy Tempest along with her. Troy got Barry to write a letter to Commander Shore, who decided to let Barry spend Christmas with him and Atlanta.