The descriptions are from the game itself... yeah.
Videos are now in place. I'll explain which class excel at what below
Blademaster
Weapons:Longsword & Buckler
1:Can shift to Attack Stance
2:Quick movement
3:Technical skills
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Warrior
Weapons:Longsword & Buckler or Shield
1:Grab attacks
2:Able to use shields
3:Fights with every part of their body
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Guardian
Weapons:Longsword & Buckler, Shield or Bulwark
1:Can equip any shield
2:High HP
3:Exellent defenses
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Berserker
Weapon:Two-handed sword
1:Bound attacks with greatswords
2:Powerful
3:Special attacks that use blood points
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Elementalist
Weapon:Staff
1:Wide area elemental magic
2:Can shift between Circle Shine and Circle Shade
3:Able to summon spirits
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Taoist
Weapon:Rod
1:Can use both physical and magical skills
2:Multiple dazing attacks
3:Wide-range melee attacks
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Illusionist
Weapon:Staff
1:Combo attacks with the Illusion Blade
2:Wide shield
3:Wide area magic attacks
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Reaperess
Weapon:Scythe
1:Uses scythes very effectively
2:Causes bleeding
3:Very elusive
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Demonisher/Soulist
Weapon:Orb
1:???
2:???
3:???
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Scout
Weapons:Dagger or Blade & Bow
1:Uses various traps
2:Enchantment-based elemental attacks
3:Can use both physical and magic
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Assassin
Weapons:Dagger or Blade & Bow
1:Excellent mobility
2:Multiple skill combos
3:Fights using traps
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Ranger
Weapons:Dagger or Blade & Bow
1:Specialized in ranged attacks
2:Excellent range
3:Excellent survival skills
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Shadow-
1/
2
Weapons:Daggers or Blades
1:Excellent mobility
2:Multiple skill combos
3:Fast attack speed and deadly tricks
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Gunslinger/Bullet Shooter
Weapon:Dual guns & Musket
1:Attacks with dual guns and muskets
2:Exceptional evasion skills
3:Ranged attacks
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Slayer
Weapon:Arc dagger & Arc Blade
1:Grab attacks
2:Charge attacks
3:Multiple skill combos
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Warden
Weapon:Arc dagger & Arc Blade
1:Freezing attacks using ice magic
2:Summon (Skulljape, Cylius) skill
3:Wide area magic
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Blade Dancer
Weapons:Arc Blades
1:Attacks cause buffs and debuffs
2:Cause bleeding
3:Specialize in primary attacks
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Nightstalker
Weapon:???
1:???
2:???
3:???
I have the following classes:Berserker, Blade Dancer, Reaperess.
You surely wonder what are the categories below, eh? It's some kind of "chart" to see which class is best at what. Since I don't have a huge experience in C9, I can't say much for now.
The order is best to worst/easiest to hardest.
Highest HP:Guardian?>
Highest MP:
Highest defense:Guardian>
Best survival chances (PVE):
Best survival chances (PVP):
Best DPS:Gunslinger
Fastest attack speed:Blade Dancer>Reaperess>Berserker
Strongest physical:Berserker>
Strongest magical:
Best AOE (skill):Elementalist>Blade Dancer>Reaperess>Berserker
Best AOE (attack):Reaperess>
Best in PVE:
Best in PVP:
Beginner friendly:Any Witchblade>Any Fighter>Any Shaman>Any Hunter