This Vocaloid papercraft is a chibi Sakine Meiko, an officially recognized derivative of Meiko, the paper toy created by tsunyandere. Her name of Sakine 咲音, literally means "Blooming Sound" and has the same pronunciation as 先音, "Preceding Sound," i.e., she precedes Miku Hatsune. Her family name is sometimes shared among her other fanmade "siblings", such as Meito in particular.
Sakine Meiko is one of the Vocaloid derivatives that became officially recognized by Crypton Future Media, the publisher of the Character Vocal Series for Vocaloid 2. The other derivatives bearing this distinction are Miku Hachune, Neru Akita, Haku Yowane, and Tako Luka. In Project Diva (PD), Sakine Meiko is an available character in the PSP game, Hatsune Miku ~Project Diva~ and again as a playable character in its sequel. If the player has not chosen him/her for a long time he/she will get angry.
She was conceived through the efforts of Producers working with Meiko's voice. This was owed largely to the fact that Meiko had become forgotten because of Hatsune Miku's popularity, leaving both her and Kaito behind. Meiko in particular did not have the young sounding voice of the released Vocaloid 2 voicebanks released at the time and therefore was not as appealing as they were to the Vocaloid Otaku based fandom. Meiko Sakine was established by Nanameue-P to push the limits of the Vocaloid software to make Meiko sound younger. Her official setting is "the Meiko who came into the music trend in the age of 16" and Nanameue-P is "the producer who rediscovered Meiko in her youth". She was later made famous by the PV "Honey" featuring her and other derivatives such as Haku Yowane and Neru Akita, as well as the UTAU Teto Kasane alongside official Crypton Vocaloids.
You can download this paper craft models here: Vocaloid - Chibi Sakine Meiko Free Papercraft Download