UYunesko are two ghosts, they were created by Sta and became a emoji in the official Tone Sphere discord server and became a trend. Also appears in Haunted Dance.
Description from Sta's tweet[1][]
UYunesko are ghosts. Unesko is ♂ and Yunesko is ♀. UYunesko are, in fact, always right around your corner. UYunesko are rather quick. UYunesko are notional beings.
Physical Appearance[]
UYunesko are ghosts, They usually have a purple outline for their hands, eyes, and mouth.
Song Appearances[]