no more random guesses eh?
cloud!?
Tifa!?
MAPLE SYRUP!?
*ahem*
but seriously now, i'm going to guess that it's sephiroth . . . hear me out
i have a face few would be proud of--> he's grey, hence old
but a certain grandeur none the less--> he's always poetic and prophecising
few, if any, know my purpose--> only a select few (cloud's troupe and shinra namely) know sephiroth's intentions, and even some of them aren't totally sure
and little it must seem--> originally think sephiroth's intention is to revive jenova, not blow up stuff
but of great matters i surely handle--> well blowing up the world is pretty huge
between the green and the white--> stops the holy from achieving it's purpose of turning white from green
