Energiser was confident in its abilities but was still cautious. He recognized that there were beings stronger than himself and would go into hiding to avoid attention.
Energiser was a powerful monster hiding in Z-City’s uninhabited zone. He was discovered by the Hero Association and was targeted for attack.
Tornado of Terror and Atomic Samurai are tasked to eliminate Energiser, but Speed-o'-Sound Sonic, disguised as Saitama, encounters the monster first. Sonic struggles to fight the monster. Fortunately for Sonic, the real Saitama arrived and together they easily defeated the monster.
Abilities and Powers
Immense Durability: Energiser took several of Speed-o'-Sound Sonic's shurikens without taking any damage.
- One-Punch Man Audiobook; Sonic, Becoming Saitama