Thread:Gu4n/@comment-45509535-20200710052246/@comment-27069677-20200714073218

As you can see, Rean's year of birth is a reference from the Sen no Kiseki Character Maniacs book. Bumping up his year of birth to S.1187 would also mean he'd turn 19 in, whereas the game mentions multiple times he's turning 20 in S.1206.

Simply put, Falcom messed up the ages of certain characters and there is no way Falcom can mend this nor the wiki can accurately depict this in a satisfying manner.