Webcomic notice The following section contains Webcomic spoilers. You have been warned, manga-only readers.

Evil Natural Water (エビル天然水, Ebiru Tennensui) was a Dragon-level Mysterious Being and a member of the Monster Association.


Evil Natural Water is a huge mass of water with a pair of eyes floating inside. It can also freely change its shape. The size of the eyes enlarge as Evil Natural Water obtains more water.


It doesn't seem to have a brain and acts completely on instinct. According to Black Sperm, rumor has it that Evil Natural Water reacts to the emotions of those around him.


Human Monster Saga Edit

Monster Association Arc Edit

He is one of the heads of the Monster Association and first seen being contained in a fish tank.

Webcomic notice The following section contains Webcomic spoilers. You have been warned, manga-only readers.

He attacks Saitama but is defeated and scattered into droplets. It later reappears in a smaller form stabbing Air in the throat. Pig God tries swallowing the creature, and it fires its jets in an attempt to escape, causing Pig God to bleed out of holes all over his body. Eventually, Evil Natural Water is digested by him.

Abilities and PowersEdit

As a high-ranked member and a Dragon-level Mysterious Being of the Monster Association, Evil Natural Water is an extremely powerful being. It was able to confront and overpower three S-Class Heroes (Atomic Samurai, Child Emperor and Pig God) simultaneously. As mentioned by Black Sperm (who heard it by rumor), Evil Natural Water is able to detect the killing intent of those close to it and attack in response.

Physical AbilitiesEdit

Homogenous body: Evil Natural Water's body is made up of water and therefore has no vulnerable internal organs or weak points to target, thus greatly reducing damage taken. Tatsumaki's psychokinesis and Saitama's tremendously powerful punches were able to scatter it into many droplets despite this but in both cases it survived. Pig God's powerful stomach acids ended the life of the Evil Natural Water.

  • Shapeshifting: Due to its entire body being composed of water, Evil Natural Water has great control over its own form; able to appear as a simple blob of water that can transform into a massive monstrous form and can imitate body parts such as jaws, and shape part of itself into a large blade.

High-Speed Jet Streams: Evil Natural Water is capable of firing devastating high-speed jets of water in an instant. The jets of water are significantly faster than bullets, fast enough to be almost impossible to track and predict, and have a higher penetrating power.


  • "Blub Blub"

Trivia Edit

  • Evil Natural Water is the third monster to survive one of Saitama's punches (after Boros and Overgrown Rover, but before Awakened Garou).