Born August 20, 2004. She is active on YouTube and TikTok under the name Mumeixxx. A popular influencer with 1.13 million YouTube subscribers and 4.9 million TikTok followers. She boasts immense popularity among young people for her dance videos and livestreams. In addition to her work as a media personality, she is active in various fields, including releasing music as an artist and appearing at fashion events. She is not good at cooking. She often makes funny faces in her videos. She is cute with large eyes, a well-defined nose, and expressive features. Extremely cute. Beautiful and has a great figure. Originally from Shiga Prefecture, she occasionally speaks with a regional drawl (Kansai dialect). She speaks casually to everyone. First person: I (casual) Second person: You / Brother

Mumei's biological younger brother. He occasionally speaks with a regional drawl (Kansai dialect). He frequently appears on Mumei's SNS and videos, such as her YouTube channel and Instagram (including "Played It" music videos, Christmas streams, dancing, and birthday celebration projects). Born July 6, 2006. He is popular among fans for being handsome, a skilled dancer, and for having a very close relationship with his sister. Additionally, he is involved with the Project SEKAI (ProSekai) world championships under the name "Nanase."