There isn't much known about Ibuki's childhood, but she almost died as a child, when she shook a coconut tree and three coconuts fell on her head. At some point of her childhood, she ended up on an illegal fishing boat and almost ended up in another country.
As a teen, Ibuki attended a girls-only high school called Shiba Academy and joined a light music club named "Black Cherry". They had a rival named "Summer Tree", which was a boy band. Ibuki wrote the songs she sings and her Hit single with her band is called After School Poyoyon Hour.
Ibuki later quit the club due to creative differences - when a talent scout was going to be watching one of their performances, Ibuki refused to play more traditionally appealing pop music, as she was much more into the heavy metal genre.
Ibuki later enrolled in Hope's Peak Academy as the Ultimate Musician, in Class 77-B. She befriended Mikan Tsumiki, Hiyoko Saionji, Mahiru Koizumi, and Sato. During their time together, they discovered a corpse in the music room. This was later revealed to be Fuyuhiko Kuzuryu's sister, who was murdered by Sato. A few days later, Sato was killed by Fuyuhiko. This scared Ibuki, who thought they were cursed. This part of her life was revealed in Monokuma's second motive, "Twilight Syndrome Murder Case".
At some point after this, Ibuki joined the Ultimate Despair group that was founded by Junko.
