Well...no one knows for sure they're exact age...but here is the general idea...for a couple...
Axel=Lea: In his early teens.
Saix=Isa: In his early teens.
Zexion=Ienzo: Somewhere between 7 and 11.
Vexen=Even: 20+
Lexaeus=Aeleus: 20+
Xemnas=Xehanort: 20+
Xaldin=Dilan: 20+
Xigbar=Braig: 20+
Roxas=Sora: 14
The others are hard to say since they're somebodies are unknown.
The members of Organization XIII are:XemnasXigbarXaldinVexenLexaeusZexionSaïxAxelDemyxLuxordMarluxiaLarxeneRoxasXion~By MapleLeaf~
it is still called organization xiii
Not all of OrganizationXIII's somebodies are know.....these are the ones that are known.... Xemans-Ansem Xigbar-Braig Xaldin-Dilan Vexen-Even Zexion- Ienzo Axel- Lea, pronounced LEE Roxas-Sora
they hav no age they are immortal Roxas and Xion are 15
No, Riku was never in Organization XIII. He wore the cloak because he wanted to hide the darkness in his heart.
lexaeus
Organization XIII's members definitely existed at this point, but the name 'Organization XIII' probably wasn't created until the time of Kingdom Hearts Chain of Memories when Roxas joined, making thirteen members altogether. We know, because of the events in Kingdom Hearts Birth by Sleep, that the members of the organization were mobilized, but "Organization XIII" in specific might not have been established.
The eldest member of the Organization is Vexen, the Chilly Academic.
The human forms of Organization XIII's members appear in Kingdom Hearts: Birth by Sleep for the PSP.
Organization XIII might have used it as a home base to regroup, rest, and practice in the case of Kingdom Hearts 358/2 Days.
Zexion is Organization XIII's Number VI The Cloak Schemer
the name says it all