Megurine Luka - choose a jigsaw puzzle to solve

Megurine Luka (巡音ルカ, Megurine Ruka), sometimes referred to as Luka Megurine, is a humanoid persona voiced by a singing synthesizer application developed by Crypton Future Media , headquartered in Sapporo, Japan . She uses Yamaha Corporation 's Vocaloid 2 and Vocaloid 4 singing synthesizing technology . Her voice is sampled from Yū Asakawa. She has performed at live concerts onstage as an animated projection.