Quiz

She had an interest in anime since her childhood, watching series such as Pesca La Tua Carta Sakura (1998) and Magica Doremi (1999).

In pursuit of becoming a voice actress, Koga would take acting lessons at a vocational school in Fukuoka. Following this, she enrolled in the training school of the agency 81 Produce, becoming affiliated with them upon her finishing her training.

In 2017, she gets her first major role as Sora Kaneshiro in Tenshi no 3P! (2017) and also became part of the band Baby's Breath along with Yûko Ôno and Yurika Endô, her co-stars in the series.

In 2019, she had her first starring role as Kaguya Shinomiya in Kaguya-sama wa kokurasetai ~ Tensai tachi no ren'ai zunô sen ~ (2019).

She appears in the Kaguya-sama wa kokurasetai ~ Tensai tachi no ren'ai zunô sen ~ (2019) live action movie where she plays one of the movie theater staff who serves Kaguya.

She first became interested in voice acting after watching the television program Okaasan to Issho (1959) and becoming fond of the puppet segments featured in the show. This made her want to "become friends with dolls" and, along with her interest in anime, helped her decide to pursue a career in entertainment.

Her first credited role in an anime was a woman in Rokka no Yuusha (2015).