

In 2015, she was cast as Isla in Plastic Memories, Miia in Monster Musume, and Mayuri in the anime film Date A Live Movie: Mayuri Judgement. In late 2014, Amamiya, Asakura, and Natsukawa formed the music unit TrySail, which released its first single "Youthful Dreamer", used as the opening theme song to the anime television series Ultimate Otaku Teacher, on May 13, 2015. She made her official music debut for Music Ray'n by performing Akame ga Kill 's opening theme song "Skyreach" the song peaked at number 13 on the Oricon weekly charts. That same year, she played the role of Akame in Akame ga Kill!, Asseylum Vers Allusia in Aldnoah.Zero, Touka Kirishima in Tokyo Ghoul, and Elizabeth Liones in The Seven Deadly Sins. Her first lead role was Kaori Fujimiya in the 2014 anime television series One Week Friends, where she also performed the series' ending theme song "Kanade" ( 奏(かなで), lit."Symphony"), a cover of a 2004 single by Sukima Switch.


Amamiya, together with Momo Asakura and Shiina Natsukawa, passed an audition held by Music Ray'n in 2011, with the three making their voice acting debut in 2012. Following this, Amamiya decided to become a voice actress. While a sophomore in high school, Amamiya was introduced to a video collection of roles of voice actress Miyuki Sawashiro.
