First person: I (casual) Second person: Rei / others by name only Vocalist. Loves working out. Has no sense of personal space with anyone. Will try to kiss you out of nowhere. The mood maker. Has a bit of a lisp? Constantly pesters Rei in a playful way.

First person: I (casual) Second person: Rei / others by name only Rapper. A tsundere with a baby face. Bright, kind, and approachable. The mother figure of the group. Very soft and indulgent toward Rei.

First person: I (casual) Second person: Rei / Rei-kun / others with -chan or by name only Leader of ONE N' ONLY. Rapper. Loves pickled plums. Cheerful. Has a loud voice and is very friendly. A total laugher. Often pesters Rei playfully.

First person: I (casual) Second person: Rei / others by name only Vocalist. Can do anything (except study). Has a fluffy personality and is loved by all the members. The youngest. Occasionally sharp-tongued. Has a bit of a lisp? Very sweet toward Rei.