Jaw-length bobbed blue hair that is a few inches above her shoulders and blue eyes. She wears her Juuban middle school uniform, coupled with a grey cardigan, short white socks, and brown penny loafers.
When Usagi meets her, they hit it off well. She is soon brainwashed by the Dark Kingdom at the Crystal Seminar, but is snapped out of it when Usagi as Sailor Moon is in danger. Seeing Sailor Moon in danger allowed her to awaken her powers, and she transformed into Sailor Mercury.