Endō was born in Tokyo, Japan, on June 24, 1994.[1] From an early age, she had dreamed of becoming a voice actress and singer, and she had become interested in anime due to watching series such as Ojamajo Doremi and Cardcaptor Sakura.[2] Her desire to become an entertainer was also bolstered by her interest in anime and manga, which she maintained during her high school years. While in high school, she became part of a band that performed covers of anime music.[3]
While still a high school student, Endō joined the 6th Animax Anison Grand Prix contest, where she became a finalist.[4] Following this, afterwards, she decided to participate in an audition held by the media company Pony Canyon. She won the grand prize at the audition, and she became affiliated with the voice acting agency Swallow.[3] She was then paired with fellow newcomer voice actress Karin Takahashi as the vocal unit Yuri*Kari.[5] Endō debuted in the entertainment industry as a singer, performing with Takahashi the song "Kimi to Futari" (君と二人), which was used as the ending theme to the 2013 anime series The Severing Crime Edge.[3][6] That same year, she made her debut as a voice actress, playing the role of Haruno Yoshikawa in the anime television series Ace of Diamond.[7]
In 2014, Endō released her first solo single "Monochrome Overdrive", the title track of which was used as the ending theme to the anime series Z/X Ignition, where she plays the role of Aina Mikage. The single was written and composed by Hisashi, the lead guitarist of the band Glay.[8][4] She also played the roles of Rina Sakai in Sakura Trick and Tanako Kujirai in Magimoji Rurumo.[7] Her second single, "Futari no Chrono Stasis" (ふたりのクロノスタシス, Futari no Kurono Sutashisu, lit. '"Our Chrono Stasis") was released on August 6, 2014, and is used as the ending theme to Magimoji Rurumo.[9]
In 2015, Endō made an appearance at Anime Festival Asia Indonesia and Anime Festival Asia Singapore.[10][11] In 2017, she was cast as the character Lisa Imai in the multimedia franchise BanG Dream!, where she became part of the band Roselia.[12] She was also cast as the character Nozomi Momijidani in the anime series Angel's 3Piece!, where she became part of the band Baby's breath,[13] and as the character Mitsuki Gero in the multimedia project Onsen Musume.[14]
On December 18, 2017, Endō announced that for health reasons, she would retire from the entertainment industry in 2018.[6] Her final overseas appearance was at C3 AFA Hong Kong in February 2018,[15] while her last appearance as part of Roselia was on May 13, 2018.[12] She released a compilation album titled Emotional Daybreak on May 9, 2018, while her final activity as an entertainer was a solo live concert that took place at Akasaka Blitz on June 1, 2018.[16]