Zensei Majin
The wicked King Cobra leads the evil Zensei Majin. The twin cobras on his shoulders fire explosive shells. Maybe armed with pole weapon with crescent blade and spike on one end, a single sword, or twin swords. King Cobra is essentially a coward who hides behing other Zensei Majin and when corned by Diamond Eye flees through a dimensional portal.
After Diamond Eye nearly killed King Cobra, the chief Zensei Majin summoned his daughter, Princes Cobra, to take charge while his wounds heal. Princess Cobra can create illusions to confuse and disorient her enemies. She may be armed with a whip or twin swords.
Note: Except for King Cobra and Princess Cobra I only listed the episodes in which a Zensei Majin fights Diamond Eye. Starting with episode 14 all the Zensei Majin stand around King Cobra in their home realm.
Armed with a cyclindrical club. Human form is a man in a business suit, armed with a pistol.
Spits fire and explosive charges. Human form is Hong Kong Hitman Chin (played by played by Naka, Yosuke [Admiral Majin in New Kamen Rider (Skyrider)]), man dressed in yellow and armed with throwing stars.
Sprays acid from its stomach. Human form is Patched Eye Tiger, armed with a machine gun.
Carries no weapons, just uses sharp claws. Human form is a Mexican man, Machine Gun Joe (played by Uenishi Koji), armed with a machine gun.
Armed with sword and sythe. Human form is Decapitator Jaguar (played by Kurobe Susumu who was Shin Hayata in Ultraman), man armed with boomarangs pole weapon with crescent blade and spike on one end.
Bites with sharp mandibles and is armed with a sword. Shield on back deflects Diamond Eye's diamond grenades. Human form is a man named Drill (played by Uchida Katumasa), who cares a black case with a gun hidden inside it.
Armed with a pole weapon with a strap attached to one end. Human form is Neko (Cat) Mask, a woman wearing a black mask, black cloak, yellow shirt and yellow pants (Kero Cat's chest and stomach are yellow). She's played by Shiozawa, Toki (the original Iquana in Ai No Senshi Reinbooman).
Satan Bat uses wings to create a powerful wind, spits fire and is armed with pole weapon. Human form is that Michael, a man dressed in black and armed with an assualt rifle. Works with a female assassin. Not killed until episode 9.
Pitodettbou sprays acid from stomach and is armed with two blades connected to a chain. Human form is a woman dressed in white and armed with a pistol. Works with male assassin.
Satan Bat uses a flaming pole as a weapon. No human form.
Wareatama is armed with a sword. Human form is Viper, the Snake, man wearing a white suit with black stripes, armed with a pistol.
Armed with a sword and imobilizing rings. In human form appears as a Roman Catholic priest named Hawk.
Armed with a large dagger. Human form is Assassin Saturn (played by Kita, Kusuo [human forms of Frankenstein in Henshin Ninja Arashi and Lens Ant in Kamen Rider V3), Electric Andes in Denjin Zaboga) bald man dressed in a black and white striped suit and armed with throwing daggers.
Armed with sword, shield and grenade like explosives. Human form is Wolf, who dressed like a police officer to begin with then switched to a red suit.
Armed with spiked wheel on a chain. Human form is Gen Kai Ryuu's female assistant, Shugoku, armed with a laser pistol.
Armed with a sawtooth-bladed pole weapon. Human form is Condor, a male gypsie wearing a red vest (Satan Bat's wings are red), used brute strength, carried no weapons.
Pitodettbou is armed with two blades on a chain. Human form is Kuroda Sensei, (played by played by Fukuyama Shozo) a man in a white suit, armed with a pistol. Wareatama and Gerarachin briefly fight Diamond Eye before retreating.
Wareatama is armed with sythe and sword. The sword gives off an electric discharge similar to lightning. Human form is Gellbar (played by Uenoyama, Koichi [Interpol agent Makoto, Arai in Inazuman Flash]), man dressed like a soldier and armed with a machine gun
Onikabuton is armed with pole weapon with crescent blade and spike on one end. Human form is a man named Kilt who dresses in black and red (Onikabuton's body is red). Advices Rankha/Princess Cobra, trying to make sure she caries out her father's wishes. He's also the Zensei Majin's healer. Not killed until episode 25.
Armed with a sword and whip, charges like a bull, tosses exploding horns. Human form is Mado (played by Ichimitsu, Hiroshi, Red Devil in Battle Hawk), man dressed in beige, armed with a dagger.
Satan Bat is armed with a pike. Human form is a man in a buisness suit, armed with a gas gun
Onikabuton is armed with pole weapon with crescent blade and spike on one end.
Armed with twin swords. Human form is an unarmed man in a business suit.
Sprays freezing gas from its stomach and generates a tornado. Human form is Demular, an unarmed man in business suit who also impersonates a doctor in a white lab coat. Not killed until beginning of episode 21.
Pitodettbou continues to generate tornados.
Last Satan Bat is unarmed and uses no special powers. Human is Gelan (played by Kozi Ozaki [Toshio Arito in Spectreman]), bearded man dressed in black, including cloak and hat.
Onikabuton is armed with pole weapon with crescent blade and spike on one end.
Armed with pole weapon with crescent blade and spike on one end, turns into a ball of fire. Human form is Gamuro (played by played by Suzuki, Kazuro [Doctor Ghost in Kamen Rider Super1-]), man who wears a coonskin cap and is armed with an assualt rifle.
The last Kero Cat has the power to enter a human's dreams to create nightmares. Armed with a two pronged pole weapon and a boomarang. Human form is woman named Marie who dresses like a gypsie fortuneteller, has clawlike fingernails.
Armed with a pole weapon that has a blade on each end. Human form is a man in a business suit, armed with a sword disquised as a walking stick.
Kerarin is armed with a gun which fires explosive charges and a long metal rod. Human form is a clown named Pierro.
Onikabuton is armed a with sword (yes he changed weapons). Finally killed.
Last Mojingga is armed with a
sword. No human form.
Last Pitodettbou is
armed with a pole weapon with a strap attached to one end. Human form
is Dogura, man dressed in black suit and white gloves, with a scar on
his forehead.
Last Kerarin is armed
with a sword. No human form.
Last Wareatama is armed
with a two pronged pole weapon. No human form.
Last Gerarachin is
armed with a pole weapon. No human form.
Most of King Cobra's henchmen are transformed into bull like (Gyutojin) or horse like (Batojin) monsters, with no special powers and which Diamond Eye doesn't even need to use "Royal Punch" to kill. If he does use "Royal Punch" on them it vaporises all of them at once. These monsters are often disguised as men dressed in black with red hoods hiding their faces.