Use any characters in any mission:
Beat the game once and you will be able to play as any character you want to in any of the missions
Unlocking 3rd weapon for each character
You must complete the quests following chapter 5
Unlocking 4th weapon for each character
Reach a Paladin, Master, and final rank for your quest
Lloyd Irving (from Tales Of Symphonia)
Play in Quest mode. When you have Ivy, Taki, Astaroth, Mitzurugi, and Sophitia in Chapter 3 you will see a scene featuring Lloyd
Irving from Tales Of Symphonia. When the scene ends, a fight starts. After some time it stops and a new fight starts. If you win Lloyd Irving will join your group
Alternate Costumes
Beat the game once.
Weapons
Complete the indicated task to unlock the corresponding
weapon:
Astaroth Alpha
Kulutues
Nanbanfu
Terror Moon: Complete the Return Of Guardian Ammon quest.
Great Maul: Earn the Diamond Paladin title.
Ivy
Kaleidescope
Kogarashi
Valentine: Complete the Imperial Army Headquarters quest.
Black Widow: Earn the "Garnet Paladin" title.
Lloyd
Rapier
Kotetsu
Shiden: Complete the Guardian Cervantes' Revenge quest.
Angel's Tear: Earn the Edgemaster title.
Mitsurugi
Masamune
The Ancient
Shishi-Oh: Complete the Defense Line In The Wilderness quest.
Pandemonium: Earn the Ultimate Master title.
Siegfried
Soul Edge Alpha
Soul Edge Omega: Defeat Guardians Fafnir, Ammon, Geki & Maki, and Cervantes
Requiem: Complete the Seal Soul Edge's Power quest.
Soul Calibur: Earn the Legendary Hero title.
Sophitia
Ice Blade
Fire Blade
Omega Sword: Complete the Beyond The White Darkness quest.
Hyperion: Obtain "Ruby Paladin" title.
Taki
Kagenui
Kris Naga
Mekki-Maru: Complete the Return Of Guardians Geki and Maki quest.
Fu-Ma Kugi: Earn the Sword Master title.
