Reincarnated as Cloud, you can save Aerith, stop Sephiroth early maybe even save Zack and alter the course of history.

I should probably mention...I have only played Crisis Core on the PSP, and played Final Fantasy Type 0. So...this may or may not be lore accurate. Also ai art is made by me. And yes everyone will be accurate age as they are in the game. Which I'm assuming would be around 20 and up?