Voyakiloid

VOYAKILOID pertains to Fanmade Vocaloids representing failure of purpose and failure of proper singing. This trend started when Caffein illustrated and drew inspiration from 2ch for the first character of this class of Vocaloids: Haku Yowane. Since then, other fans added to the family of Voyakiloids, deriving their personalities from none other than Haku herself, although this isn't the case all the time. Many official Vocaloids have a Voyakiloid equivalent.

Haku Yowane (弱音ハク)

 * Main Article and detailed information : Haku Yowane

Haku is arguably the most well-known of the fanmade Vocaloids. She is a mascot for those who could not produce a beautiful or proper sound from Miku. She is created from one 2channer's complaint of "I bought Miku, but all I could get was mechanical grumbling." Her name comes from the word yowane wo haku (弱音を吐く), which means "to say negative thoughts," "to show white feather."

Dell Honne (本音デル)
Dell is Haku's Twin brother, who is based on Len and is always smoking. He represents failed Len users/songs. Characterized as a workaholic, irritable and a black-hat hacker (called crackers in Japan). He is conceptualized by Caffein, the same artist who illustrated and conceptualized Haku. Here is his poster art and his concept art. His name means honne ga deru (本音が出る), or to speak real feelings.

Hakuo Yowane (弱音ハクオ)
Hakuo is the male version of Haku, and can somewhat be considered Mikuo Hatsune's fail. Unlike Haku, Hakuo tends to be a real pushover and is easily manipulated to do anyone's bidding. He is very childish and often whines. Due to his low self-esteem, he is somewhat of an alcoholic. He is conceptualized by Sakurai and Haru Yoshi, while also illustrated by Random-Explosion. Illustration samples are linked here, here and here.

Deruko Honne (本音デルコ)
]Deruko is the sibling of Haku, Dell, and Hakuo. She is possibly the failed Rin, but is considered to be Hakuo's twin moreso than Dell's. She is also a workaholic, but tends to sleep with people to get her promotions.

Kizu Mona (茂名キズ)
Kizu is apparently somehow related to Dell and Haku, although not by family. She is based on Meiko and represents failed Meiko songs and users. Kizu causes pain on herself when she sings terribly. Which means she's hurting herself ever so often. Her design and voice configuration are still being worked on, but will be completed soon. Kizu was not created by Caffein, but rather Escuro (whom now goes by Pregap).

A na Naikou (内向アナ)
A na is-- the failure version of Luka. She is always complaining about how badly she sings, and tries to make others feel bad for her. She has long, messily cut white hair, a pair of broken headphones, and a simple, broken, grayscale version of Luka's outfit. She detests meat, especially fish.

KIAITO (キアイト)
KIAITO is the failure version of KAITO. He has white hair with a thin ponytail at the end, a light gray scarf, and a dark gray sleeveless jacket with a mixed purple/blue shade. He wears low-cut black pants with the same purple/blue shade arrow and a thong. KIAITO represents people who use KAITO and fail, then refuse to show others what they've done. KIAITO has a bandaid constantly on his face, due to him being so clumsy and shy. His character item is a first aid kit. He was created by Marini135 and Random-EXplosion. Here and Here is a full picture of him.

Bitter Annie

 * Main Article and detailed information : Bitter Annie

Bitter Annie is the failure version of Sweet Ann, portrayed as her VOYAKILOID equivalent, like Haku is to Miku.

Fruscia
Fruscia is the failure version of Prima. She appears very quiet and soft spoken. She wears a newsboy cap and trenchcoat, both in a light blue color. She wears a white collared shirt underneath, and a lighter blue tie. Fruscia wears white pants tucked into blue rainboots, as well.

Sonaka
Sonaka is the failure version of Sonika. She is depicted as very careless and bored. She wears a tank top and shorts that were once Sonika's pants, but they were torn and are gray due to her depression of Vocaloid fans complaining about her outfit, and that she wears pants. She holds a grudge against Vocaloids who are loved by fans but can wear pants. She wears combat boots and has a tendency to wear makeup. Her character item is a pair of scissors, ready to destroy any new clothing she buys. She was drawn and created by Raze, picture seen here.

Tekuno Hirane (平音テクノ)
Tekuno is the failure version of Gakupo. He can sing, he just can't be bothered to. His character item is a PDA. Here is a full picture of him.

Guma (グマ)
Guma is the failure version of Gumi, AKA Megpoid with cracked goggles. She is always getting upset by someone who dislikes her appearance or her voice(which sounds like Meiko's). Her character item is raddish. She is conceptualized by Onaneko. She also has her own voice configuration by IseL08Drgn