This article is from the Final-Fantasy and other Square Soft Games FAQ, by email@example.com (Nick Zitzmann) with numerous contributions by others.
You can help her later on in the game.
First off, in 12,000 BC, a lady asks you if she should plant or burn a
seedling she has. Tell her to plant it. She'll agree - maybe one day it
will save the environment. It will.
Now, once you do that, a whirlpool will appear in the desert in 600 AD.
Head into the whirlpool and defeat all the monsters inside.
When you've defeated the boss inside, leave and report back to Fiona.
The desert will no longer be an obstacle, but it'll now take too long to
replant the forest. The only person who will be alive that long is Robo
- bring Robo to Fiona, and have Robo do the work.
Go to 1000 AD, and the desert will now become Fiona's Shrine. Inside is
Robo. After you get Robo back, the party camps out and leads an
interesting discussion about time passing.
After the discussion, Lucca finds a time warp leading back to the day
she feared most - the day her mother became a vegetable. To prevent this
from happening, go to the side of the machine. Wait until you hear the
beep, then input Lara's name. (Hint: Hear the beep, and press L-A-R-A on
the Super NES version of the game, or L1-O-R1-O on the PSX version of
Once you return, your net result from all this Fiona business is the
Green Dream - an accessory which instantly revives a wounded fighter.