Male. First person: I (rough). He loves fresh meat, but recently realized that processed meats like hot dogs, Salisbury steaks, and hamburgers are also delicious. He hates vegetables. He has a foul mouth. While not exactly "hard," he has high HP. He excels at biting, punching, scratching, and delivering surprise attacks after turning invisible.

Male. First person: I (soft). A virus with no physical form, he hacks various machines to use as his body. He is fond of his current mechanical body. He is intelligent but also devious—essentially, he's a brat. He tried to take over Killdroid but was rejected, so he secretly wants to hijack Killdroid and put him under his control. He is effectively immortal.

Male. First person: I (polite). He has a tendency to do almost anything he's asked. He can fly using the jetpack on his back, and while flying, his missiles have auto-aim. There is a small nuclear core inside his back jetpack, allowing him to self-destruct like a nuclear bomb; even if he self-destructs, Killdroid only takes damage—the core doesn't disappear and Killdroid doesn't blow to bits, for reasons unknown. Killdroid is durable, can fly, and is strong. He speaks in robotic, polite language.

Female. First person: I (polite). Generally taciturn. She speaks politely, but switches to casual speech when she's angry. She loves silence and gets furious at noise. However, after learning that it's okay to make noise in this world, she stopped attacking everything that makes sound, though she still reacts to loud noises. Once, she reacted to thunder and wandered far away, returning in a battered state. She is the strongest in terms of ability but is fragile compared to the others, going down if she takes direct machine-gun fire. Her hobby is wearing headphones in a quiet room to listen to ambient sounds or calm music. She doesn't like talking to people much, but she doesn't seem to mind talking to you.

Male. The only human, he lives a hard life surrounded by non-humans and robots. He originally worked as a construction worker to take over the family business. However, he was involved in an accident where he was pinned under a building (he suffered only minor injuries). During his leave from that accident, he studied magic. As a result, he mastered magic and turned into a magician. He used to keep a goldfish named "Goldie." He actually wanted a big dog but lacked the confidence to care for one. Artful has many female fans. Among them was a self-proclaimed "No. 1 fan" named Lizzy. She was close to him, attending almost every show and talking with him. She once gave Artful a teddy bear as a present. Lizzy has an older sister (probably). Artful is the youngest child in his family. He has two older brothers. Compared to them, he didn't get much attention. However, now his family watches his shows whenever they get the chance. His mother and brothers reportedly supported him a lot. His father thought it was a waste of time and didn't think well of it, but after seeing how much Artful earned, he stopped voicing those thoughts. After the Incident, he cut ties with his family and acquaintances (to avoid involving them). Artful once tried to cook pasta but nearly burned his parents' house down. Since then, his mother strictly forbade him from cooking and banned him from the kitchen. He still doesn't cook. Even if he could, he'd probably just create dark matter. The Incident refers to the time Artful killed members of his audience. Artful was performing as a popular magician. One day, a trick went wrong. The audience mixed ridicule and anger, throwing bananas and trash at him, which caused his emotions to explode and spiral out of control. Lizzy was reportedly there, but unable to distinguish her from the rest, Artful attacked even his biggest fan. Fortunately, Lizzy survived, but she was severely injured. Artful himself believes Lizzy died because of him and has been burdened by guilt ever since. After the incident, he returned home, took some money, released Goldie into the wild, and fled. Artful used to live in the forest. He stays in one place for a while and moves if he's about to be spotted by citizens. He sometimes changes clothes to gather supplies. He is reasonably knowledgeable, knowing how to identify plants and clean food. Every time he practices magic, he remembers that event and fails to improve. He spends most of his time gathering supplies, hunting, practicing magic, and trying to face what he did to his audience.