Ritsune Kyu

Ritsune introduces herself as the eldest of the four Kyu sisters and the keyboardist and singer of IRIS. She describes herself as a night owl who loves the moon and stars but is scared of the dark, and as someone who loves to "yap" with her chat. Her youngest sister Vianna calls her "the brain" of the sisters.

Ritsune's hair is split in two colours and can be worn tucked behind her ear or down. Each of her earrings represents one of her sisters: pink for Ailee, green for Sirae and blue for Vianna. Her removable jacket reveals a pale complexion, and like her sisters she has a beauty mark and mismatched leggings and socks – part of the sisters' shared design. Her outfit is predominantly black and white with red rose accents. The charm on her choker doubles as her debut sub badge. She is the only one of the sisters who does not use a retro-style microphone. The charms on her microphone represent her sisters: a green ribbon for Sirae, a pink flower for Ailee and a skull for Vianna.

• The name of Ritsune’s mascot is Harmony the Songbird.
• Ritsune’s fan name is "Songbirds."

On 12 September 2026, Ritsune uploaded a cover of Evanescence's "My Immortal" and made her debut on Twitch and YouTube as the third segment of IRIS's relay debut, following Ailee and Sirae and raiding into Vianna. She opened the stream by singing "My Immortal".

• When you're hungry, sometimes you've got to be a little bold. ** Our dad took us in off the street one day when he passed by us with bread. Ailee wanted his attention, Sirae threatened with a knife. And Vianna was just more interested in Kyu, the seal. ** And that's it~ The rest is history.

• Ritsune’s favorite foods are salmon, potatoes, any kind of potatoes. She is not the biggest fan of sweet potatoes. She loves fettuccine Alfredo even though her stomach might not. She also loves fried pickles, and ranch. * Ritsune really really really loves fruit, but she is very particular about which fruits. * Ritsune’s favorite music is music by Taylor Swift, Sabrina Carpenter, lately she’s been getting into KATSEYE music. And if all these 3 fail then she will listen to Disney or Musicals. Ritsune loves Disney, literally anything from Disney movies can always fit in from whatever. * Ritsune’s favorite movies include the Wicked films, Project Hail Mary, Mamma Mia! and The Notebook. She also enjoys musicals such as Sweeney Todd, Les Misérables and The Phantom of the Opera. ** Ritsune loves the music from Sweeney Todd The Demon Barber on Fleet Street. * Ritsune’s favorite game is The Elder Scrolls V: Skyrim. She also loves The Legend of Zelda and the Harvest Moon/Story of Seasons series, her favorite being Grand Bazaar. ** Skyrim and The Legend of Zelda are what made Ritsune like video games. * Ritsune’s favorite anime include Sailor Moon, Tokyo Mew Mew, Pokémon, Miss Kobayashi's Dragon Maid and Love Live!. She owns a framed Sailor Moon image signed by the character's original English voice actress. * Ritsune’s likes the night sky, rainy and stormy days, Christmas and snow, cats, the ocean, reading, and collecting vinyl records. * Ritsune’s favorite Pop Tarts flavor is S’mores. * Ritsune loves Crocs, think Crocs are a must-have foot accessory. * Ritsune’s favorite ice cream flavor is black cherry vanilla. * She mostly drinks juice (apple, grape and Hi-C), strawberry or raspberry lemonade and Capri Sun, and her favorite soda is Cherry Coke. * Ritsune’s favorite flowers are red roses. * Ritsune loves salmon, her favorite way to have it is grilled. * Ritsune’s favorite pizza is Pepperoni and mushroom pizza. * Ritsune’s favorite cookies are classic chocolate chip, Oreos and Elf Fudge.

• She dislikes bugs, heavy screamo, tornadoes, mornings and light mode.

• Ritsune's hobbies include gaming, reading thrillers, singing, travelling, road trips and stargazing. The only sport she follows is baseball.
• She is the second-tallest of the sisters at 5'7", after Sirae.
• Ritsune is very good at memorizing music.
• Her goals include becoming a Twitch and YouTube partner, releasing an original song, learning to sing in Japanese and Korean, trying ASMR, and one day being a guest at a convention.
• Out of the 4 Kyu sisters, Ritsune has the biggest "personality".
• Ritsune took a dere test, she is a Rindere.
• Ritsune’s personality color is Rose Quartz.
• Ritsune’s birthday color is Pure White.
• Ritsune is from Minnesota.
• Snow leopards used to be Ritsune’s favorite animal when she was a little girl.
• Ritsune has a dog named Daisy and she is part Australian Shepherd.
• Ritsune’s favorite color is pink.