ころんば
A retired [[UTAU]] composer who used to upload songs on [[niconico]]. Has suddenly deleted all of their videos circa 2014, but their songs maintain cult popularity to this day, to the point that covers/MADs/YTPMVs (most notably [[Iwashi ga Tsuchi Kara Haetekuru n da (utau)|]]) and tribute songs are being frequently made (some even having relatively difficult-to-search titles). They are also the creator of the [[Yume Nikki]] fangame [[LcdDem]].

Within the UTAU community, their name is generally considered a forbidden word, and is commonly known by the alias "xx".
koronba