A year later during the Six Invitational 2021, Imagawa was placed on Team Mira, led by Elena 'Mira' Álvarez.
During the 2020 Six Invitational, Imagawa landed a killing shot on Pulse that led to her team's victory. She later began a secret relationship with Jack 'Pulse' Estrada. In 2016, Hibana accepted an invitation to join Rainbow. From her diverse training, she acquired a rare tactical versatility, which includes a proficiency in tubular (bus, train, and airplane) assaults. She became specialized in paramilitary techniques gained by training with the SAS, FBI SWAT, and GIGN, to name a few. It was at this time she became acquainted with Kana 'Azami' Fujiwara. Her diverse techniques and charisma resulted in her to moving quickly up the ranks. Fluent in seven languages and lethal with any weapon, Imagawa was recruited by the Aichi Police Department Special Assault Team. She later attended the National Police Academy and gained the nickname of 'Hibana' due to her improvised explosive devices and brilliant leadership skills on the field. Imagawa traveled the world to perfect her skills and technique. This long range weapon marked her entry in martial arts by perfecting her assessment of multiple factors a once while carrying precise, controlled, and fluid motions. A Nagoya native and the daughter of a local butcher, Imagawa was encouraged by her family to practice Kyūdō from a young age.
