Secret Characters
Complete the game once to be able to unlock all the secret characters except Ezel. Babus:
Successfully complete the Left Behind mission before entering a town and clear the With Babus mission

Shara:
Successfully complete the A Maiden's Cry mission before entering a town

Ritz:
Successfully complete the Mortal Snow mission

Cid:
Successfully complete all 300 numbered missions

Ezel:
Select Gossip in the Card Shop then successfully clear the Reconciliation mission


Unlock the following characters by having different mission items. It is not guaranteed that these characters will join your clan.

Pallanza:
Successfully complete a mission with Wyrmstone as a mission item

Eldena:
Successfully complete a mission with Elda's Cup as a mission item

Lini:
Successfully complete a mission with The Hero Gaol as a mission item

Cheney:
Successfully complete a mission with Snake Shield as a mission item

Quin:
Successfully complete the 'Missing Professor' mission

Littlevili:
Complete the 'Clan League' mission


Unlock end of game credits:
Beat the 300 standard missions and the extra Judge missions