Energiser

Energira (エネルギー, Enerugī) was a monster in the audiobook, "Sonic, becoming Saitama".

Personality
It recognizes that there are beings stronger than itself and will go into hiding to avoid attention

History
a powerful monster hiding in Z-City’s uninhabited zone

Abilities and Powers
a monster with limitless energy stock

the ability to compress said energy and emit them from its hands

Fighting Style
Hand-to-Hand Combatant: