I just got Strago in Final Fantasy VI (SNES version), who is a playable character who is ~70 years old. Got me thinking that you don't see many older protagonists in games, maybe especially retro games.

I remember the elderly wizard from The Immortal (NES), but I can't think of many more. I guess retro games were largely targeted at children so most characters were very young.

Do any older protagonists come to your mind in retro games? Or similarly, any retro games whose subject matter deals with aging?

You start as a kid in Dragon Quest V, but you're married with kids at the end of it.

Fire Emblem also has multiple older playable characters. There's enough of them to the point where it's a character archetype in the series (the Jagen, named after Jagen from the first game). Jagens start with more life experience and higher initial stats, but younger characters surpass them if trained properly by the player.