Valkyrie Profile

There are three items in this game that will allow you to gain levels at an amazing rate.

Learning Ring:Increases EXP by 30%.
Coin of Fortune:Increases EXP by 50%.
Book of Refining Gold:Turns each Monster into at least 10 Mystic Gems.

So, from this you can see that if you have a character equipped with 2 Learning Rings and a Coin of Fortune they will be getting roughly double the rate of experience that everyone else is. This will allow you to get a Character like Valkyrie to the high levels up fast.

Some characters in the game once obtained have special items. some are significant like Arngrim's Dragon Slayer. Some are as useless as Lleweyn's goddess pendant. Here is a list on some that you can obtain:

Arngrim- Return to his bedroom to obtain the Dragon Slayer
Janus- Return to his home to receive the raven slayer
Belenus- Enter Asaka's bedroom to obtain the crushed flower
Mystina- enter her room to get the Infinity rod
Kashell- to obtain his sword return to the Camille cemetary.
Badrach- talk to the little girl in the Camille church to obtain the woven bandana
Yumei- return to the beach at Hai Lan to get the cerulean lapis
Nanami- enter the Dragon God's palace and return to the shrine she met Minayo at to receive the DragonBane sword
Lleweyn- Return to the forest where he last hugged his girlfriend to recieve the Goddess pendant.

To see a scene where Brahms and Lezard discuss their future plans, simply wait a couple of minutes after the credits are done rolling. I believe this may only be possible if you obtain the A Ending.

This only works in normal and Hard mode. As soon as you access the stage "The Tower of Lezard Valeth" You will be able to find the creation jewel. When eqquiped on Valkyrie, the broken weapons and armor can now be transmuted into the powerful Glance weapons and armor. Top notch gear until you hit Seraphic Gate. It will also make the tome of Everlasting life into an ice sword, capable of obliterating all fire based opponents in one hit.