ryoune yami
Ryoune Yami is an otoko no ko UTAU voicebank & character, voiced by Kiki (tsunya).
His design is taken from the /cm/ board of 4chan's genderswapped/trap version of the "Ecstasy AKA Darks" meme. Said meme originated from 4chan's /a/ board back in 2007. The original image of Darks was an image of someone's self-insert original character posted on DeviantArt, said image depicted a poorly-drawn generic emo boy with blue-dyed black hair and a small list of his likes (Blood, Death, Knives, Psycos, Pointy objects, Green Day, and staying up all night), dislikes (Peace and love), age (13), and height (5"2).
A copy of the original image can be found here.
Sometime in 2010, someone took /cm/'s super kawaii version of Darks and turned him into a Vocaloid trap. He retained most of his characteristics but was given a different name so that trolls wouldn't find him. He dresses up as a girl, does covers of songs using his own UTAU sound bank, and has buttsex with other fan-made UTAUs for the amusement of young yaoi fangirls on DeviantArt.
This page and tag on danbooru is for the created UTAU.