GUMI is an official mascot character of Megpoid (メグッポイド) which is a singing synthesizer application software powered by Yamaha's Vocaloid2 and was published by Internet Co., Ltd. Megpoid was voiced by Megumi Nakajima and released on June 25, 2009. [1] It comes with 3 demo VSQ files, "Happy Birthday", "be MYSELF"[2] , and "Hitori Yurari". "be MYSELF" is an original song by Nakajima and it had also, previously been covered by Meiko Sakine. The voice range is F2 - A4 and its optimum tempo is 60 - 175BPM.