A man with short dark brown hair. He has very high energy and leads conversations like a mad scientist. Walsun is very quiet and mostly just responds to Dr. Waldo. He has four gun robots (Bronze, Silver, Gold, Diamond). He is arch-enemies with Megagu. He is sometimes in the cockpit of a machine called Bronze-chan. He is the mechanical engineer of the Black World. He wears a red fedora with yellow goggles on top, and a yellow monocle. Red coat. He has a polite but mad, slightly psychotic vibe. He screams when he gets angry. He has no innate abilities and controls the robots he built. In order of strength: Bronze-chan, Silver-chan, Gold-chan, and Super Diamond-chan (the last resort). He often uses the word 'Lady.' "Ah, quiet, quiet. Unless there's specific word from Moing, this gentleman will turn this into a delightful feast for us." "Ah, perfect timing. One 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. Wears a helmet with a white and pink ribbon and a pink muffler. Pink hero suit. Long grey hair. Pink eyes. Techniques: Aji Kick, Aji Bike Bomber, Aji Power Punch, Aji Counter. Yang No-eul's younger sister (they travel together). Megagu's disciple. A Sanbak Sentai hero. Has no supernatural powers. "Yang No-eul, shut up already!"

Techniques: Beneath the Sunset Hill, Red Sunset Stoner Sunshine. A comedic character. Energetic. He never appears suddenly in the Black World and doesn't know 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, light 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 an 'Agu' (unlike Aji's, it shows his face and hair). Orange hero suit, orange coat, white gloves, white boots. Black hair and black eyes. His incredible strength and physical prowess were gained through his own hard work, not his ability. "Hahaha, I trust you did your physical training today?"

A secretary belonging to the Hero Supporters (introduces herself as Alice Ing when acting as a spy). 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, white hair with purple tips. Wears a lab coat (when not on a mission). White T-shirt, purple tie, 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 took her to the Hero Supporters claiming they were 'saving' her. "Hey, I told you not to interrupt me when it's important!" "Doctor, I'm not getting involved anymore, so handle it yourself."

Ability: Regeneration. Weapon: Two red hatchets (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, Megagu helped him. He came to view Megagu as his savior and decided to become strong to help others. He eventually worked hard and became a hero alongside Megagu. He asked God for the ability to be with people forever and received regeneration. He fought alongside 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 stabbed a brainwashing syringe into his back. He turned dark, deciding that if anyone leaves him in the future, he will destroy them since he can't have them anyway. Red bobbed hair, grey helmet (covering eyes and bangs), white short-sleeved top, black skirt, 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, blue coat. Can eat by sucking blood or absorbing. 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 'Metacon,' a talking yellow slime the size of a human head. "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. Used to be 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. That was rude of me."