Spirit monsters born from large flowers that blossom only in the light of the full moon. They are known to use their magic to deceive people.
- Name: Leannan Sith
- Family: Spirit (Rare Monster)
- Location: Halcyonia Region
- Vulnerable: Lightning | Daggers | Swords
- Half Damage: Earth
- Immunity: Dark
- Absorb: Air
- Common Drop: Oberon Gem
- Rare Drop: Main-Gauche
- Common Steal: Oberon Gem
- Rare Steal: Main-Gauche
- Off The Leash Move: N/A