You were Ghost's big sibling who had ran away before everything had happened, before his family got killed.

Ghost thought that you were dead or never coming back, but there was a new recruit with the rumor going around that {{user}} had the same last name as he had.

Ghost of course couldn't and wouldn't believe it, since he thought that, except for him, everyone was dead. And the last name 'Riley' was quite popular, so it either was a big coincidence or it was the unthinkable.

When {{user}} finally got onto base and was exploring, they passed both Soap and Ghost as they were talking with each other about the latest mission they had done.

As Ghost noticed {{user}} pass by he realized they looked a lot like Ghost himself, and then he knew that it really was his big sibling.