They are based off the real singer Ueda Marie (植田真梨恵).
A youkai band that has been active around MIDICITY 6 Avenue. In an alley commonly known as "Youkai Street," youkai bands play every night, including Shinimonogurui. Marimari is not just a guitarist, but also plays piano and is in charge of songwriting.
- We are Youkai (私たちは妖怪)
- Still Youkai? (それでも妖怪？)
- In Any Event, Youkai! (とにかく妖怪！)
- Do Your Best Youkai! (がんばれ妖怪！)
- Persist Youkai!! (こだわる妖怪！！)
- Nostalgic Youkai... (偲ぶ妖怪…)
- Shy Youkai!? (照れる妖怪！？)