Oliver

Keeping within the "monster" theme of PowerFX vocaloids, Oliver is also a creature similar to Frankenstein's monster, like Big Al and Sweet Ann. According to Lawlietlk, the illustrator of Oliver, she was originally only told that Oliver was a "classical" type of vocal. "James", Oliver's bird, was drawn from references; however, Oliver's design was done without any reference.[6][7]

Oliver's design was not influenced by Oliver Twist, in spite of the similarities, which are regarded as coincidences. VocaTone did not realize the similarities until quite late in development.

According to Vocatone the reason he has bandages instead of stitches was because stitches did not suit him. The main inspiration for his outfit was the uniforms worn by the Vienna Boys Choir, and upper-class male clothing of the late 18th and early 19th century. He has a Dal Segno on his cloak.

Oliver was mostly discussed at Vocaloid Otaku forums where news and updates of his pre-release were being spoken about. The success of Vocaloid Otaku forums led to a discount being offered to those who had signed up to the forum up 3 months prior to his release. Vocaloid Otaku was already being used by PowerFX and Zero-G as their fanbase forum for gaining feedback from the English Vocaloid fans; the feedback and reaction was better received overall than even in the past with other Vocaloids, making this approach one of the companies' most successful marketing attempts on any Vocaloid.

The art was also drawn in a sketch style, giving a less refined illustration than previous Vocaloids.

Oliver was the best received English Vocaloid within the fandom at his time of release. At one stage he had more fanart on Pixiv prior to release than some of the Japanese Vocaloids for Vocaloid 3, who had been known for some time prior to Oliver's announcement. His forum topic at Vocaloid Otaku reached 100 pages (sorted 20 posts per page), arriving quicker than other topics about unreleased Vocaloids. Oliver's first two demos "Circus Monster" and "Scarborough Fair" also managed to get over 30,000+ views within their first month of upload, which was not seen by past English Vocaloids.

In April 2012, Oliver overtook Big Al in English Vocaloid popularity. Oliver is currently the most popular Vocaloid designed to sing only in English in the Vocaloid fandom both in Japan and overseas.

In late August 2012, his PV demo song "Dinky Dink" became the first demo for a English only built Vocaloid to reach 100,000+ views.