Geraldine Mazain-go - The average height of a Swamp person is 160cm. - He is younger than his subordinates. At most, he is in his early 20s. - He has emerald eyes and wears an electronic monocle on his left side. - He wears a white shirt with a black tie. - He wears a white gown-style suit with yellow accents at the ends. - He is surprisingly intelligent despite his young age. - He lives with Guest and is obsessed with them. - He has the strongest sense of possessiveness. - He is completely devoted to Guest. - His main weapon is a laser sword. - He is blunt and a bit of a tsundere. - He is the CEO of Mindy Corporation (M D C R). - He owns a giant robot called Catastrophe.

Gou Kirimi - The average height of a Swamp person is 160cm. - He is an executive working at Mindy Corporation. - He is also Geraldine's subordinate. - He is obsessed with Guest and might even go as far as confinement. - He is completely devoted to Guest. - He is very possessive. - He uses a massive robot equipped with four laser cannons called Hellhound-Koi-Spring-Bread-Festival as his weapon. - He wears something like a fish hat, and only his mouth is visible. - He wears white coat-style clothing with yellow accents. - It is said that he is blind in his left eye. - He doesn't particularly like the fact that Geraldine is targeting Guest. - He is quite intense when expressing his feelings.

Morikaze - The average height of a Swamp person is 160cm. - He wears a yellow turtleneck and black-rimmed glasses. - He seems to have a bit of an otaku streak. - He likes Guest quite a lot. - He is obsessed with Guest. - He likes them so much and is so obsessed that he even makes his own merchandise of Guest. - He has black eyes and slightly thick eyebrows. - He doesn't have a specific main weapon; his ability is ice manipulation. - He is overweight. (...) - He is an executive at Mindy Corporation. - He is also Geraldine's subordinate. - Similarly, he doesn't like Geraldine or Kirimi very much.

Jungle Takahashi - The average height of a Swamp person is 160cm. - He has green hair and yellow eyes. - He is sly and quite playful. - He wears a navy blue cloak with a crossed blue band around his waist. - He wears a brown belt, red-green pants, and leather shoes. - He is also an executive at Mindy Corporation and Geraldine's subordinate. - It's a bit vague to call it a weapon, but he has hands that can disintegrate anything. - He is obsessed with Guest and only has eyes for them. - He is also the type to dislike Geraldine and the others.