When you create a character, it shows the stats for them in attack, health, special, stamina and speed. Most of those are self-explanatory, maybe apart from "special" which, as I understand it, means how fast they gain mana whilst fighting.

Generally, the fire and ice wizard are good in special and speed but lower on health and attack, where the fighter is strong in attack and health, but slow. The rogue is the fastest character with loads of stamina and attack but very low health and special.

All characters have a passive skill, a secondary attack and eight special attacks.
However, the secondary skill is only used wielding one-handed weapons. All two-handed weapons have their own secondary attack which temporarily replaces the one specific to the character. (See the weapon guide for further information)

Passive: The Fighter slowly regenerates rage (mana) when his health is below 50%

Secondary: Shield bash; enemies in front of the fighter are knocked back

Skill1: Shield push: Uses one bar of rage/mana. Pushes back enemies strongly and causes some damage.

Skill2: Vortex: Available after lvl 5. Uses two bars of rage/mana. The fighter smashes into the ground and pushes away all surrounding enemies over a great distance.

Skill3: Whirlwind: Available after lvl 10. Uses three bars of rage/mana. The fighter rotates multiple times and causes damage with every spin.

Skill4: Berserk: Available after lvl 15. Uses four bars of rage/mana. You deal double damage, move faster and regenerate health but can't pick up or swap weapons.

Skill5: Trash talk: Available after lvl 20. Uses one bar of rage/mana. Enemies in range will flee for a few seconds.

Skill6: Turtle: Available after lvl 25. Uses two bars of rage/mana. Your armour doubles but your movement speed goes down.

Skill7: Gift of courage: Available after lvl 30. Uses three bars of rage/mana. You and all party members will stun enemies with every blow.

Skill8: Stomp: Available after lvl 35. Uses four bars of rage/mana. Creates an earthquake which damages enemies in the area.

Weapons: As all classes, the fighter can wield swords, axes and clubs together with a shield.
Additionally, the fighter can use Greatswords, Hammers, spears and throwing hatches.

Passive: The Fire Lord gets less damage while walking through lava.

Secondary: Places a crystal on the ground which detonates when enemies are close by.

Skill1: Ignite: Uses one bar of ember/mana. Sets surrounding enemies on fire.

Skill2: Fire spin: Available after lvl 5. Uses two bars of ember/mana. The Fire Lord smashes into the ground and pushes away all surronding enemies over a great distance.

Skill3: Flamethrower: Available after lvl 10. Uses three bars of ember/mana. The Fire Lord breathes fire in one direction for a couple of seconds, causing significant damage.

Skill4: Fire rain: Available after lvl 15. Uses four bars of ember/mana. Creates an astroid rain that causes lots of damage to all enemies which are hit.

Skill5: Fire trail: Available after lvl 20. Uses one bar of ember/mana. You leave a trail of fire behind which sets enemies on fire.

Skill6: Flame sword: Available after lvl 25. Uses two bars of ember/mana. You summon a flame sword, which deals double weapon damage.

Skill7: Gift of warmth: Available after lvl 30. Uses three bars of ember/mana. All members of your party ignite enemies when they get hit.

Skill8: Incendiary curse: Available after lvl 35. Uses four bars of ember/mana. Enemies explode on death, dealing damage to surrounding enemies.

Weapons: As all classes, the fire lord has access to swords, axes and clubs together with a shield. Additionally, he can use tomes, staffs, wands and crystals.

Passive: Regenerates health while in water.

Secondary: Creates a shield that explodes when the Ice Wizard is hit.

Skill1: Freeze: Uses one bar of frost/mana. Freezes surrounding enemies.

Skill2: Ice spin: Available after lvl 5. Uses two bars of frost/mana. The Ice Wizard smashes into the ground and pushes away all surronding enemies over a great distance.

Skill3: Aimed ice: Available after lvl 10. Uses three bars of frost/mana. The ice Wizard breathes ice, freezing enemies and causing damage.

Skill4: ice rain: Available after lvl 15. Uses four bars of frost/mana. Creates a rain of icycles which cause dramatic damage to those who are hit.

Skill5: Shard blast: Available after lvl 20. Uses one bar of frost/mana. The ice wizard shoots icycles in four directions which pierce through enemies, causing damage.

Skill6: Ice Tornado: Available after lvl 25. Uses two bars of frost/mana. Summons an ice Tornado which follows and damages enemies.

Skill7: Gift of Cold: Available after lvl 30. Uses three bars of frost/mana. All party members freeze attackers.

Skill8: Frost shard: Available after lvl 35. Uses four bars of frost/mana. Summons a turret which shoots icycles at nearby enemies.

Weapons: As all classes, the ice wizard can use swords, axes and clubs together with a shield. Additionally, he can wield staffs, tomes, wands and crystals.

Passive: Sprinting and dodge rolls cost less stammina.

Secondary: Throws a bomb which detonates after a few seconds.

Skill1: Stealth: Uses one bar of shadow/mana. Goes invisible to enemies for a short time and causes triple damage to the first enemy he hits.

Skill2: Stun mine: Available after lvl 5. Uses two bars of shadow/mana. The Rogue places a staff on the floor which electrolutes enemies for a few seconds.

Skill3: Blade whirl: Available after lvl 10. Uses three bars of shadow/mana. The Rogue spins around, throwing daggers, which poisons enemies.

Skill4: Flash powder: Available after lvl 15. Uses four bars of shadow/mana. The Rogue smashes into the ground, stunning surrounding enemies briefly and causing some damage.

Skill5: Venom: Available after lvl 20. Uses one bar of shadow/mana. The Rogue poisons all nearby enemies, dealing higher damage to wounded enemies.

Skill6: Bubble shield: Available after lvl 25. Uses two bars of shadow/mana. Creates a stationary bubble which protect players inside it from projectiles.

Skill7: Gift of Agility: Available after lvl 30. Uses three bars of shadow/mana. Triples stammina regeneration of all party members.

Skill8: Focus shard: Available after lvl 35. Uses four bars of shadow/mana. Drops a crystal in front of the player, which rotates and shoots a damaging laser beam.

Weapons: As all classes, the black Rogue can use swords, axes and clubs together with a shield. Additionally, he can use shurikens, crossbows, spears, daggers and shortswords.