Bug
Dual Swords 
Axe 
Book Even though he is a Demon, he secretly admires <The Seven Deadly Sins> for defeating both the Demon King and <The Ten Commandments>. Normally he takes the form of a tall, athletic man, but can transform into a small monster when the situation calls for it.
Costumes
Shy Demon
Demon's Outing
Veiled Darkness
Back Attacks increase Crit Damage by 15/20/25% and DoT by 15/20/25% for 10 sec. (Cooldown: 20 sec)
Shadow Walk
Hour of Darkness
Landing a Critical Hit inflicts additional damage equal to 10/15/20% of Attack. Landing a Critical Hit on an enemy with a Burst active increases their Burst duration by 4/5/6 sec. (Cooldown: 12 sec)
Demon's Stealth
Successive Ambush
10/12.5/15% chance to decrease the cooldown of the Normal Skill by 60/70/80% when landing a Back Attack. (Cooldown: 3 sec)
Keen Instinct
Mind's Dominion
Hitting a Stunned enemy increases Debuff durations by 40/50/60% and DoT by 14/17/20% for 10 sec. (Cooldown: 20 sec)