Iron Skull

Iron Skull (철골귀) is a robot-themed ghost that appeared in season 5 episode 9. And it's nickname is Machine of Danger.

Iron Skull
Ghost Information
Name	Machine of Danger
Aliases	Robot Ghost (Tensive Name) Cheolgolgwi (Korean Name)
Goal	Protect her daughter (Yeowon) from danger at all costs
Power and Abilities	Object Merging Drill Attack Wires Attack Object Manipulation
Weakness	Electric Shock (Presumed)
Fate	Illnesses Defeated by Dearest Snail Bride, Leo and Jubi
Production
Voice Actor	Han Choi
Episode appearance	9
Season	5