Sephiroth was born to a woman named Lucretia, he was thought to be dead until 4 yrs ago when he once again showed himself by killing President Shinra, he then went on to summon Meteor, however thanks to the efforts of AVALANCHE Sephiroth was beat and Meteor stopped, however I highly believe Sephiroth is still alive, only in recooperation. Hey, it wouldn't be the first time!
Cloud was born in Nibleheim (Me too!) he returned to Midgar a few years ago as a mercenary, however what started as a routine job became his ultimate challenge. He started not knowing EXACTLY who he was, he was having memory lapses, his story was he was in SOLDIER and had accompinied Sephiroth into the reactor, however later on we learned that he never made it into SOLDIER. All the memories he had were made up from what Zack had told him. Cloud was vital in stopping Sephiroth, he had to give him Omnislash to stop him. We haven't heard from Cloud in a while, however his wife Aeris works for us.
Tifa was born in Nibleheim but later moved to Midgar and joined the rebel faction AVALANCHE. When Cloud arrived in Midgar she was surprised but she knew something was wrong because the things she remembered Cloud could not and vice versa. Tifa was a very major part in rescuing Cloud from the Life Stream and restoring his memory. However she too has not been heard of since stopping Meteor.
Aeris was born in Icicle Lodge, her parents were killed by Shinra and she was the last of the Cetra. She ran into Cloud in a church in the slums of Midgar, she soon joined AVALANCHE and their cause. She was praying for Holy in the Forgotten City when Sephiroth stabbed her trying to stop Holy, as we all know it was to late to stop Holy. When Meteor was about to hit Holy came out having the opposite affect, then the Life Stream gushed up and stopped Meteor, Aeris was in the Life Stream. Later on Cloud came across some materia called Life Materia nad used it to revive Aeris. She now works for me and it is a GREAT honor to have her.
Barret was born and raised in a coal town called Corel. One day Shinra came and burnt his town while he was out. He never forgave them. He moved to Midgar and started AVALANCHE to rebel against Shinra. His rebellion turned into something much bigger. A battle for the planet!! Barret helped in stopping Meteor. Now he has rebuilt Corel and is the acting Mayor.
Cid was a Astronaught and Pilot who's dream was to fly into space. He met up with Cloud one day and he soon realized his dream.
Without Cid's Mechanical expertise and vehicles it would have been incredibly difficult to stop Meteor in time. Now Cid live's in Rocket Town with his wife Sherry.
Caith Sith was a fortune telling robot who met up with Cloud in the Gold Saucer and was later found out to be a Shinra spy named Reeve. Without Cait Sith AVALANCHE never would have got the Black Materia for the first time and wouldn't have known what Shinra's next move was. Reeve now works here, he is still Head of City Devolpment.
Nanaki was born in Cosmo Canyon and was taken by Shinra Scientists to there lab where they gave him the name Red XIII and were gonna mate him with Aeris. However Cloud showed up just in time.
They stopped Hojo and Nanaki joined them. They went to Cosmo Canyon where his grandfather told Cloud he wanted him to accompany him. Red XIII was one of the ones who stopped Meteor. He is now living in Cosmo Canyon.