Subtitle: Witch Monster (魔女怪獣 Majo Kaijū)
Demon Star was created by the Alien Gross to stop people from getting close to their base under construction in the witch valley of Kiso.
Demon Star was later revived by Wutan as part of the Ghost Monster Corps (亡霊怪獣軍団 Bōrei Kaijū Gundan) along with Antron, King Jaigras and Dokuros King to keep Jumborg Ace busy while he rampaged on Earth. She appeared together with Ghost Antron but was killed when Jumborg Ace rammed both of them into Ghost Dokuros King.
- Demon Star reuses Antlar's roars.
- Designer: Yoshiaki Yoneya
- Design motif is a ladybird lizard.
- Height: 53 m
- Weight: 40,000 t
- Origin: Space
- Powers and Weapons
- Missiles: Demon Star can fire missile-like fireballs that fired on her mouth.
- Destruction Ray: TBA
- Hallucination Brain Waves: TBA