Meet the conditions to unlock new characters. They can be selected before starting a game.

Character	How to unlock
Agnes the Witch	Kill 200 Slimes
Algorab the Alchemist	Deal 35,000 damage with alchemic weapons
Cid the Seer	Kill 250 Carrots
Corvus the Vampire	Kill 5,000 enemies
Glyndor the Battlemage	Kill 120 Orcs
Hadar the Templar	Kill 25 Demons
Jules the Harlequin	Open 10 mystery boxes
Kraz the Novice	Kill 200 enemies with the magic wand
Leto the Cleric	Kill 200 Imps
Loki the Vagabond	Play 20 games
Menzi the Shaman	Kill 40 Shamans
Osuna the Bard	Kill 250 Kobolds
Rigel the Acrobat	Deal 15,000 damage with staves
Saiph the Librarian	Deal 25,000 damage with spells
Simon the Sorcerer	Win the game