One of the main characters of the Idolmaster series.
A smart, cool 18-year-old who was originally an intern for 765 Production, but later promoted to idol due to lack of idols scouted. Industrious and focused, Ritsuko also handles the business side of her career. She hopes to become a producer herself, and in some games, actually is one.
She is serious as an idol as well, almost always wearing her glasses. Her hair is often tied into twin braids, though her hairstyle variations increased. Her cousin Ryou appears in the DS game Dearly Stars as an idol of 876 Production (and later in Side-M).
She is voiced by Wakabayashi Naomi.
- Age: 18 → 19
- Height: 156cm
- Weight: 43 kg
- Birthday: June 23rd
- Blood type: A
- Three sizes: 85-57-85
- Hobbies: Qualifications, Logic, Volunteering
- Skills: Analyzing Paperwork
- Writing Hand: Right
- Horoscope: Cancer
- Hometown: Tokyo
- Type: Cool (Cinderella Girls) Visual / Fairy (Million Live)