Neptune

**Neptune**(ネプチューン *Nepuchūn*) is a Neptune-based Mythology Kaijin that appeared in Episode 1 of Kamen Rider X.

He is voiced by **Ritsuo Sawa**, while his human form is played by **Ono Kenyukai**.

## Personality

Neptune is an obedient Kaijin who is shown to be murderous and a little sadistic.

## Appearance

Neptune has a humanoid appearance where the right side of his body is covered with scales and has fins around his arm and waist. His left side has the appearance of a bronze statue with big chains wrapped around his arm and his thigh. He also has a fin on top of his head and a fin tail with spikes on the end.

## Biography

A new secret society, called G.O.D, targets a man who is the son of scientist, named Keisuke Jin. While the foot soldiers of G.O.D, called the GOD Warfare Agents, go after him, a man rises out from the waters onto a beach where he digs up a small statue. A voice comes out of the statue, telling him to start a plan. At that moment, the man changes into a sea monster called Neptune and heads back to the waters.

Later, when the Warfare Agents chase after Keisuke, they corner him at a pier and one of them shoots him into the waters. There, Neptune appears in the water and spits out foam from his mouth to melt Keisuke, but he manages to swim away safely. Later, when Keisuke and his friend, Ryoko, go to see his Dad, Professor Jin, at his laboratory, Neptune follows them around and even leaves a message for Keisuke from the General Commander of G.O.D, telling him all about their evil organization.

Neptune then attacks a ship where he reduces two crew members to skeletons with his foam and then sinks the ship. Professor Jin discovers the skeletons and tries to study the foam that they were covered in, but then late at night, Neptune and the Warfare Agents appear and attack. The next morning, Keisuke finds his father injured outside of his lab and he gets shot by the GOD Warfare Agents. To save his dying son, Professor Jin modifies him into Kamen Rider X.

When Professor Jin gets himself killed, Keisuke transforms into Kamen Rider X and rides up to the beach where he fights off the Warfare Agents. After fighting them off, Neptune appears and fights with Kamen Rider X. As they fight, Neptune throws his trident at Kamen Rider X’s leg, injuring him. Kamen Rider X still manages to fight and knocks Neptune down with his Ridol Stick. Finally, Kamen Rider X uses X Kick to finish off Neptune, blowing up his body. Neptune’s head falls in front of Kamen Rider X, still alive, and blows up the bomb in his neck in an attempt to take Kamen Rider X with him. Fortunately, the explosion wasn’t big enough to take down Kamen Rider X and Neptune is completely destroyed.

## Powers/Abilities

* **Human Disguise**: Neptune can disguise himself as man wearing a black shirt and a black hat.

* **Trident**: Neptune’s main weapon is a trident that he can use in combat.

* **Adapted Swimming**: Neptune is able to swim through water.

* **Melting Bubble Foam**: Neptune can shoot out foam from his mouth that can melt whoever touches it down to their bones.

* **Teleportation**: After a small spark explosion occurs, Neptune can appear in place. However, this was only used once in the episode.

* **Neck Bomb**: Used as a last resort, Neptune will blow up a bomb his own neck in an attempt to take his enemies down with him.

## Trivia

* A lightning storm is always shown whenever Neptune appears or when he changes into his monster form.