From Emil Chronicle Wiki

Ghost is a level 45 monster.

[edit] Stats

Basic	Combat
Level 45 Experience 550 Job Experience 590 HP 2,100 SP 200 MP 200 Behavior Passive, Cast Sensor (Range)	Type Magic Creature A.SPD 3.00 ATK 180 - 220 DEF 90 C.SPD 3.50 M.ATK 290 - 480 M.DEF 105
Properties Dark Item Drops Spirit Dust, High Magic Candy, Crest Paper, Silver Medal Skills Lullaby Location Undead Castle