Laguna finds an old key (no spoilers please if possible)

[magemasher]

There are two keys to find. Laguna loses both of them. You cannot keep them.

That said, it does unlock things later in the game. Finding (and losing) the keys will open a door to an Ultima draw point, or open a door to obtain a LuvLuvG.

Ah cool, well I only found one and I'm too far to go back now. Thanks for the info.