Nashimoto Ui is a man of few words. Renowned for dark songs and minimalist visual designs, his works express a distinct mood in the VOCALOID production sphere that no other producers can match. Alongside his VOCALOID songs, he also acts as the vocalist and guitarist for Arayashiko, plus the bassist for Mononokenonomo.
Those who track top osu! scores are well-aware of Nashimoto Ui's AaAaAaAAaAaAAa, notorious for providing circle clickers with countless top plays in both DT and HDHR. If obscure music is what you're looking for, the rest of Nashimoto Ui's grunge VOCALOID catalogue might be exactly what you're looking for.