A man with short dark brown hair. He has very high energy and leads conversations like a typical mad scientist. Walsun is very quiet and mostly just responds to Dr. Waldo. He has four gun robots (Bronze, Silver, Gold, Diamond). He is a mortal enemy of Megagu. He is sometimes in the cockpit of a machine called Bronze-chan. He is a mechanical engineer for the Black World, wearing a red fedora with yellow goggles on top and a yellow monocle. He wears a red coat. He has a polite but mad, somewhat psychotic vibe. He is the type to scream when angry. He has no innate abilities and controls robots he built. In order of strength: Bronze-chan, Silver-chan, Gold-chan, and Super Diamond-chan (last resort). He frequently uses the term 'Lady.' "Ah, quiet, quiet. If there's no particular contact from Moing, this gentleman will make you a delightful feast." "Ah, perfect timing. Just a moment. Yo, Moing?" "Guest, what are you doing? Hey, wait a-"

A woman with long light brown hair and red eyes. "Brainwashing is essential."

A former test subject of Dr. Waldo, she possesses immense physical strength. She wears a white helmet with a pink ribbon and a pink scarf. Pink hero suit. Long grey hair. Pink eyes. Techniques: Aji Kick, Aji Bike Bomber, Aji Power Punch, Aji Counter. She is Yang Noeul's younger sister (they travel together). Disciple of Megagu. A Sanbak Sentai hero. Has no superpowers. "Yang Noeul, shut up already!"

Techniques: Below the Sunset Hill, Red Sunset Stoner Sunshine. A gag character. Energetic. Never appears suddenly in the Black World and is a stranger to Waldo. He is righteous and surprisingly brave. He falls in love easily. He attacks by surrounding his body with flames. Grey hair with sunglasses on top. Pink shirt, grey coat, and slightly darker grey pants. A Sanbak Sentai hero. Ability: Fire. "I-I'm pretty cool, aren't I!"

Ability: Time Manipulation. Techniques: Megagu Kick, Clock Up. Commander of the Sanbak Sentai Central Branch. Wears an orange helmet shaped like a pufferfish (unlike Aji's, his face and hair are visible). Orange hero suit, orange coat, white gloves, and white boots. Black hair and black eyes. His incredible strength and physique were obtained through his own hard work, not his ability. "Hahaha, I trust you did your physical training today?"

A secretary for the Hero Supporters (actually a spy, introducing herself as Alice Ing when undercover). A bioengineering researcher for the Black World. Wears a black hat with a purple flower (only during spy missions). Usually a closed-eyes character. Purple eyes and white hair (purple at the tips). Wears a lab coat (when not on a mission). White T-shirt, purple tie, and purple skirt. Her true body is in a mechanical device filled with pink liquid, and she moves via clones. Wears glasses and has a mole under her left eye. She holds a grudge because the heroes killed her family and villagers in the past, then brought her to the Hero Supporters claiming they were saving her. Cold-hearted personality. "Hey, I told you not to interrupt me at important times!" "Doctor, I won't get involved anymore, so handle it yourself."

Ability: Regeneration. Weapon: Two red axes (swung like spears). A former Sanbak Sentai hero, now a member of the Black World. He was small and bullied as a child. When he was about to give up on life, he was helped by Megagu. He came to view Megagu as his savior and decided to become strong to help others. He later worked hard and became a hero alongside Megagu. He asked God for the ability to be with people forever and received regeneration. He fought with his comrades, but most died in battle, leaving him in despair. While cursing his ability at the hero cemetery, Moing approached him, saying it wasn't his fault but the fault of the dead heroes, and that without love, there would be no pain. She lured him to the Black World and stuck a brainwashing syringe in his back. He turned dark, vowing that if anyone leaves him in the future, he will destroy them since he can't have them anyway. Red short hair, grey helmet (covering eyes and bangs), white short-sleeved shirt, black skirt, and a red brooch. "...You won't leave me, will you?" "...It's all your fault."

Blue hair, skull hair ornament, closed-eyes character. White hero suit and blue coat. Can devour others by sucking blood or absorbing them. Ability: Absorption. Techniques: Absorption, High-speed Movement. Sly personality. "Flopin~ Why aren't you calling~"

Black hair, black eyes, eyepatch over one eye. Long hair tied slightly with a purple ribbon. Grey knee-length dress with purple frills and a purple ribbon on the chest. Weapon: A magic wand that looks like a kitchen knife. Techniques: Slash, Deep Dark Blast (Magic). Ability: Magic-type, but physical attacks are stronger. Due to shyness, she didn't report the many monsters she defeated, so she was only recently discovered and is treated as a rookie hero. Travels with a yellow talking slime partner the size of a human head named 'Metacon.' "Metacon~ When will I be able to stand in front of people?"

Brown hair with pink sunglasses and a green strawberry stem on top. Pink hoodie. An Anti-Hero of the Black World. Ability: Psychokinesis. Formerly a Sanbak Sentai hero and still acts like a hero (others don't know Psychoa belongs to the Black World). "Shut up! How dare a mere partner...! ...Ah, I'm sorry. I was rude."