Yami Kuraiko is Mitsurai/Kurais 2nd UTAU.
He got released on the 28. Febuary 2017
The voicebank is downloadable here:
R-18 content is forbidden
Commercial use of the character only with permission
Commercial use of the voicebank only with permission as well.
More informations (Demos, updates):
http://de.utau.wikia.com/wiki/Yami_Kuraiko (German UTAU Wiki)