Igarashi Rika is a Japanese VTuber affiliated with Nijisanji. She debuted as part of the unit "Idios" and is known for her energetic and lively personality. Rika is a gyaru and enjoys exploring the outdoors to find fun activities. With innate mesh highlights in her hair, she stands out visually. Rika's backstory reveals that she used to be a salesgirl at a ballpark and was drawn to subcultures. She decided to become a Virtual Liver after discovering Nijisanji through an online video. Rika is talkative and sometimes talks uncontrollably, especially when playing games. Apart from her love for anime and video games, she also has a passion for watching baseball games, influenced by her grandfather. Rika's YouTube channel was created in October 2022, and she quickly gained a following, reaching milestones such as 50,000 subscribers and becoming open for monetization and channel membership. Her fanbase is known as "coaches."