Characters

Green Knight - Can perform poisonous attacks. Starts out with a sword.
Red Knight - Can perform lightning attacks. Starts out with a mace.
Blue Knight - Can perform ice attacks. Starts out with a sword.
Orange Knight - Can perform fire attacks. Starts out with an axe.
All of the above colored knights are available from the start.
Gray Knight - Can perform arrow and bomb attacks. Unlocked by completing the barbarian boss with any character.
Black Knight - A dark knight that uses arrows and knives.
Barbarian - Can Throw various weapons. Unlocked by completing the King's Arena
King - Unknown
Red Dragon Knight - A demonic dragon-like knight that uses fire attacks. Unlocked by completing the game as the orange knight.
Bear - Can perform wind based attacks. Unlocked by completing the game as the Skeleton.
Saracen - A warrior based on a middle eastern warrior and can perform sand attacks.
Thief - Can perform arrow and knife attacks. Is unlocked by completing thieves' arena.
Industrialist - Can perform saw based attacks. Is unlocked by completing the game as a blue knight.
Periwinkle Knight - Can perform arrow and bomb attacks, is equipped with a lightsaber like weapon when unlocked. Unlocked by completing the Lava arena.
Eskimo - Can perform Ice based attacks similar to the blue knight, is equipped with a whaling spear
Brute - Can perform earth based attacks.
Ninja - Fires shuriken and uses a mug for defense. Equipped with a Sai when unlocked. Unlocked by completing the game with the Red Dragon Knight.
Skeleton- Undead warrior that uses evil magic. Unlocked by completing the game with the red knight.
Royal Guard - Can perform arrow and bomb attacks. Unlocked by completing the game with the green knight.
Civilian - Unknown. Unlocked by completing the game with the peasant.
Killer Beekeeper - Can send killer bees to attack enemies.
Peasant - Can perform arrow and bomb attacks. Unlocked by completing Peasant's arena
Necromancer - Unknown.
Alien Hominid - Attacks with a plasma gun lance. Automatically unlocked for people who downloaded the full version of Alien Hominid HD