He and Jean are romantically linked. See also Cable, Havok and Starjammers. Alison and Longshot are romantically linked. See also Shatterstar. In Cable's future, several Externals banded together to form the High Lords of New Canaan.
Externals apparently become more powerful and harder to kill as they get older.
Firestar's origin was told in a 4 issue miniseries. His story was that he doubted that she truly wanted to marry him. See also Opal. See also Phoenix and Cable. Lila had been Canonball's girlfriend.