Tamade Chiyu

 is a returnee who attends Celosia International School as a third-year high school student. Due to her excellent grades, she was accelerated to a grade higher than her age.

She goes by the stage name, read as CHUCHU) and is the leader, producer and DJ for the band RAISE A SUILEN. She uses DTM (Desktop Music) to compose music.

Similarly to Kokoro, she is very rich. She lives in a penthouse where the band also practices at.

Background
Ever since she was young, Chiyu has been involved with music and played different kinds of instruments such as the piano and violin. However, she did not start playing out of her own will, but rather because of her parents' high expectations - particularly her mother Miu, who is a famous violinist working overseas. Despite Chiyu's inadequate skills and the pressure her mother put on her, Miu was always telling Chiyu to keep working hard and doing what she thought was the best for her only daughter.

As a result, this led to Chiyu wanting to put together the ultimate band all by herself, as she believes that by doing everything herself, it would force people to recognize her talents.

Appearance
Chiyu is a short girl. She has sky-blue eyes with voluminous, salmon-colored hair reaching her hips, and a tall single ahoge.

She is normally seen wearing her school uniform, which consists of a white buttoned shirt with a red and white striped tie, a dark blue school blazer, a plaid miniskirt, black crew socks, and brown loafers. She also wears black cat-eared headphones.

Her 6th anniversary spring casual attire consists of a turquoise tank top with a sheer shirt underneath, both overlayed by a white jacket, black shorts with a purple belt, and a black choker necklace.

Personality
Chiyu is very professional, confident, and stubborn about her band and ideas, and likes calling herself a "kind, generous producer". She tends to be quite arrogant and aggressive towards the other bands, as well as her own band members at times; however, she refrains from being rude. While she sometimes has outbursts and yells at her band members, she has admitted to having trouble with controlling her emotions and finding the right words, and tends to get depressed after realizing what she'd done. She also used to be lonely before forming the band, and despite frequently denying it, Chiyu enjoys trying out new things and going to different places with her bandmates.

Chiyu dreams of changing the world with the strongest music, and sees Yukina as her rival, due to Yukina turning down her offer of producing Roselia's music. However, Yukina doesn't share this sentiment of rivalry. As a result, she wants to crush Roselia and prove that her band is better than them; she later adds Poppin'Party to this list as well. After BanG Dream! 3rd Season, she makes peace with both bands and they have mutual respect for each other. However due to her stubborn and competitive nature, she'll sometimes do silly things in order to prove she's better than her rivals, such as in the Little Rose Harmony event when she attempted to eat the "Supersized Stress Set" at the family restaurant because Ako told her that everyone in Roselia can finish it.

As a result of her studying in an international school, she often speaks English or adds English words to her sentences, and even refers to herself with the katakana spelling of. She also refers to everyone by their full names, including Marina.

Game Interactions
A list of characters Chiyu interacts with in the game (during Lives and in the dialogues at the end of every game).

Etymology
Tamade (珠手): Tama (珠) means "jewel, pearl" and De (手) means "hand".

Chiyu (ちゆ), from the characters 知由: Chi (知) means "to know, to understand, to comprehend" while Yu (由) means "cause, reason".

Trivia

 * Her birthday is the same date as when RAISE A SUILEN's 3rd official live, Brave New World, was held.
 * She is both the shortest member of RAISE A SUILEN and the shortest of all the 35 main girls.
 * Chiyu's habit of speaking English is a reference to her voice actress, Tsumugi Risa, who can speak English considerably well.
 * She dislikes taking baths.
 * In addition to being out-of-shape, Chiyu is also bad with hot temperatures and the cold.
 * Chiyu was the only character to be showed only wearing her school uniform as her casual attire until the 6th anniversary update.
 * In the Tokyo Revengers collaboration, her design was based on . Upon completing a limited-time event mission, players could also unlock Mikey's kimono for Chiyu.