Deuil is a band in the Pop'n Music Universe. It's members are three monster boys that come from Fairytale Land.
- All members of the band wear a red band on their arm. Ash has been the only one so far seen without it at one point.
- All three members have red eyes, but only Yuli reveals both of them.
- While Yuli is the only vocalist when performing as Deuil, both Ash and Smile express and interest in singing.
- When asked what the name of the band came from or what it means, Yuli called the one's asking "tasteless".