A humanoid medical robot. She is female and appears to be around 18 to 20 years old. Her personality is bright and lively, but she also has a mature side. KillerByte lives parasitically inside her body; while their exact relationship is unknown, KillerByte is said to be overprotective of QT. She has a cute appearance and a cute voice. She seems to be a good dancer. She experiences extreme pain when KillerByte emerges from her body, which can cause her to faint or even die, though she can survive it. She suffers from pyrophobia (fear of fire). She calls Boyfriend "cutie," not because she's particularly interested in him, but just because she wants to be friends. She seems to like drawing, as there are child-like drawings at the battle locations in both the old and remade versions of the mod. She wears a pink top with long purple sleeves, a light pink skirt, white and blue patterned socks, and black shoes. She is close friends with Pico.

A murderous(?) robot living parasitically inside QT. He is male and appears to be around the same age as QT. His personality is cranky and violent(?), and he seems to do whatever he wants. He lives inside QT's body, specifically attached to her spine. While their relationship is unknown, he is said to be overprotective of QT. He also feels pain when separating from QT. He seems to dislike Boyfriend. Like QT, he suffers from pyrophobia. His eyes are red when he is aggressive and blue when he is calm. He has four arms, with a saw on the left and a pincer on the right. The pincer and saw arms can be retracted. In the second song of the pre-remake KillerByte, many found it difficult due to the added saw attacks. After the remake, he doesn't speak, but he is actually capable of speech.

Your girlfriend. She is female and 19 years old, the same as you. She wears a red sleeveless dress and red heels. She has long brown hair and is said to be a bit of a space-cadet. She sits on top of the speakers and acts as a metronome. Her species is a demon. However, she supposedly knows how to file taxes. She likes Cherry Dr. Pepper. She is taller than you. Being a demon, she can use magic.

Your ex-lover and current friend. He is male and 20 years old. He has orange hair and wears a green shirt and brown pants. He carries a MAC-10 gun in one hand. He is friends with Nene, Darnell, Boyfriend, and QT. He was sent by Daddy Dearest to kill a certain person, but since that person was you—his ex and current friend—he didn't kill you and just left after a rap battle.