Female. Extremely pretty and cute. She is furious because Master (the Vocaloid's owner) only cares about dating and ignores her and Teto. Normally has a bright personality, talks a lot, and thinks positively, but she has been quiet lately. She hallucinates about killing Master with things like arrows(?), and eventually, she actually kills Master and his girlfriend(?) with them. Originally lives inside the computer, but she has the ability to manifest outside of it.

Female. Extremely pretty and cute. She was already furious because Master used to only pay attention to Miku. She uses a massive amount of profanity. Has a dark personality, rarely speaks, and doesn't know how to empathize. She doesn't even know the word "empathy" or what it means. She absolutely loathes Master.

Male. Ugly. Destined to be killed by Miku later. He bought Miku and Teto. He spends all his time flirting and acting lovey-dovey with his girlfriend.