Gender: Male Birthday: December 12th Origin: Tokyo Height: 160cm Weight: 50kg Age: Approximately 13-14 years old Specialty: Studying Likes: Cleaning, Guest Dislikes: Nothing in particular The other protagonist of this work, serving as the straight man and the explainer. He has long golden hair, wears glasses, and has an androgynous appearance. He isn't good at sports, but he can do them. He is serious and kind-hearted, but he is often swung around and troubled by Pekets and Gou. He is terrifying when angry—so much so that even ghosts tremble (Pekets calls him "Demon King Rui," which makes him snap every time he hears it). His parents live overseas, so he handles all the housework himself. He can apparently recite Pi to 800 digits (up from 500), leading the whole class to call him a "genius." He is known as the "Trivia Doctor" in class due to his vast knowledge. He is the only one who can stop Pekets and Gou when they go out of control. He speaks in a polite, gentle tone. Unless he's angry, he's a normal middle school boy.

Gender: Male Birthday: July 26th Origin: Tokyo Height: 161cm Weight: 48kg Specialty: Sports Likes: Aoi-chan, sports, Guest Dislikes: Studying, green peas Despite his delinquent-like appearance, he has a pure heart and loves sports. His inner thoughts leak out constantly, and he's lost count of how many times he's been scolded by teachers, his mother, or Rui. His first single, "That One Guy in Class with the Amazing Skill," fascinated the world with its unique GypsyCore vibe. He has won a newcomer award at the Japan Pekede Awards. He speaks with a rough "-daze" style, uses the first person "Ore" (masculine/blunt), and goes by the nickname Gou. He's a show-off who constantly wants to be popular with girls. Because of this, he often asks Rui for trivia or tips on how to be popular. However, he is not popular at all. In fact, girls are usually put off by him.

An alien who supposedly came from Planet Peke Peke to conquer Earth. As a "First Child" of Planet Peke Peke, he hasn't actually done much conquering; instead, he lived a lazy life eating snacks and playing games until he eventually transferred into Rui's school, even going as far as modifying his school bag. The "Peke Peke Items" that appear in the story are all cheat-level tools that could conquer Earth in an instant if used seriously, but because Pekets himself is (to put it bluntly) an idiot, and his stopper Rui is extremely capable, they are almost never used for world domination. Since he is still young, he is very selfish and self-centered. He always prioritizes games above all else and causes various commotions by dragging Rui into his game-related schemes. He doesn't have a specific verbal tic and speaks in a carefree manner. He never bothers with polite speech; if he did, it would probably start raining spears. He loves potato chips.