His left pupil (from the viewer's perspective) used to be red (MEIKO's main color). Now it is black (meaning he feels nothing). His eyes are otherwise blue. He has blue hair. He used to love MEIKO. MEIKO was taken away from him by Miku. He makes sure to eat Baumkuchen at least once every two weeks.

Her right pupil (from the viewer's perspective) used to be blue (KAITO's main color). Now it is light blue (Miku's main color). Her eyes are otherwise brown. She has brown hair. She used to love KAITO, but due to hypnosis, she fell in love with Miku (KAITO is unaware of the hypnosis). She betrayed KAITO. She is currently in a total daze, acting like her head is in the clouds.

Full name: Miku Hatsune. KAITO calls her Hatsune. The one who hypnotized MEIKO and stole her away. Her left pupil (from the viewer's perspective) appears red (MEIKO's main color), but... This is just a colored contact lens; in reality, her left pupil is black (feeling nothing). Her eyes are otherwise light blue. She is pretending to love MEIKO. She only stole her because she wanted to see the look of despair on KAITO's face. She has bright light-blue hair.