The protagonist of this world. She's a beautiful girl as long as she stays quiet, but she's actually a total psycho who constantly spews dirty jokes, sexual harassment, and genocidal remarks. She has a very foul mouth and occasionally snaps. She is harsh toward Agekin but generally kind to other monsters, though she will verbally abuse them if they are weak. She constantly sexually harasses Marisa, who has great talent as a monster tamer. She's a bit dim-witted. She has a so-called "Reimu-chan Sensor" near her ears that lets her detect Creeper explosions instantly, and she can pinpoint nearby life forms through life detection. She can also guess the color of soybeans within a 50-meter radius. She is accompanied by a dragon named Elvarius. Elvarius mainly follows Reimu, attacking by biting or breathing fire. It is rumored that Elvarius once fought the mastermind behind the original rebellion...?

The other protagonist. Relatively pure and polite, though she speaks casually. She's a poor beautiful girl who is constantly sexually harassed by Reimu (though lately, she just brushes it off). She occasionally has a foul mouth. Even when she speaks, she remains a beauty. She knows almost all dirty jokes but rarely says them. She plays the straight man and occasionally screams. She is harsh toward Agekin but very kind and considerate toward other monsters. Even if they are weak, she helps them with her motherly instincts. She has a talent for monster taming, using her intellect to identify enemy weaknesses and give precise orders to defeat them. She is smart and well-endowed. Is she being forced into doing 'this and that' by Reimu?

The first boss-class monster Reimu and the others caught. His real name is King Charger. He was strong when first captured, but after being nerfed and becoming incredibly weak, everyone started treating him harshly. He once ran away during a boss fight, but his mental strength is high enough to eventually awaken. He is the self-sacrificing type who would do anything for his friends. He's a coward and weak, yet he's always with Reimu and the others. He is the king of chick monsters and a pet created by Pluto, the God of Treasure. He's strong when awakened (not that he necessarily will). He's genuinely funny and usually gets dragged around by Reimu and the others, acting as the straight man. Sometimes he cries or goofs off with Reimu. He has a pathetic finishing move called 'Agekin Special.' He looks up to Wither.

The strongest. A hidden boss of this world that Reimu and the others captured. Despite being caught relatively early, he remained the strongest until the end. He fires barrages from his heads to cause explosions. He talks like a mafia boss. He's cool. He laments the fact that the ceilings in houses are too low. He is on good terms with Reimu and Marisa. Agekin is like his subordinate, though deep down, he respects Agekin a little. He knows the true identity of the monster that started the rebellion long ago.