Minus Energy (マイナスエネルギー Mainasu Enerugī), also known as Negative Energy, is a form of dark energy that exists throughout the Ultra Series multiverse. This energy can be created from negative emotions like hate, greed, and jealousy.
Minus Energy was first introduced as an energy source in Ultraman 80. This energy was emitted from many characters and allowed the creation of several Kaiju. Many later installments to the Ultra Series have villains use Minus Energy as empowerment for their creations.
Yapool is a prime manipulator of Minus Energy, and it is later revealed that his body is comprised of this energy.
A noteworthy location is Planet Tenebris in Nebula M78. The planet has an extremely high concentration of Minus Energy.
- Monster Creation: Large amounts of Minus Energy is able to create monsters. Sometimes the created monster would use a physical medium as a vessel, as seen with Delusion Ultraseven.
- Empowerment: Minus Energy is able to be used to empower other beings.