Project Diva ~f~ DLC costumes.

Neru, Haku, and Teto announced as DLC costumes

Fans of  SEGA's collaboration game Project Diva ~f~ for the Playstation Vita can throw more money at the company!

Teto Kasane, Haku Yowane, & Neru Akita

Sega announced at their TGS day 1 Project Diva panel the first of hopefully many downloadable costumes.
"Fake" Vocaloids (Known as Vipploids, Voykailoids, and BOKAloid amongst other names)

So who are they really? Many people know their names and songs but how did they come to be?

Teto Kasane

Teto's Project Diva ~f~ skin. 

The only one of our girls to have actually become a vocal bank.

Teto started out as a prank on popular web page "2channel" She was created with the intent of tricking Vocaloid fans. The video "Uso no utahime" [Fake Diva] Explains the rise and fall of Teto Kasane. Teto who didn't have a voice was given one by a Vocaloid rival program called "UTAU"
Despite this, both Crypton Future Media and KEI (the illustrator of the Crypton's Vocaloid Character series) have recognized Teto as part of the Crypton Vocaloid family.

While Neru and Haku have been included in the Project Diva games Teto was excluded. The reasons being that she is neither an official Miku derivative, nor a Vocaloid. However, SEGA was able to add her as a DLC for Project Diva 2nd.

Teto singing in Project Diva ~f~ 

Haku Yowane

Haku Yowane's Project Diva ~f~ skin.

Haku started her existence as a tag in Nico Nico Douga videos. Used to describe videos that used Miku but ended up sounding bad, Haku represents those who have tried and failed at composing Vocaloid songs.
After the tag became popular artists gathered to create an avatar and Haku was born. Her name means "To utter bad things)

Haku is recognized as an official "Miku derivative" meaning she uses Miku's voice to sing. Despite this both Haku and Neru are rarely seen singing. Usually the dance or are background scenery. Haku has only ever had one song to make it on Vocaloid rankings. The song "Daughter of White", a part of the "Story of Evil" arc, tells of Haku's roll in the story. 

Haku singing in "Project Diva ~f~" 

Neru Akita 

When a Television program in 2007 slammed those who used the Vocaloid program, the internet quickly cut Miku off from the world. Outraged, Miku fans took to the internet to complain. While many got riled up some people just brushed off the news saying "I'm going to bed". (Aa, Neru) For those fans who cared but pretended not to, Neru Akita was created to represent. Her name means "I'm bored, I'm going to bed" 

 Forever with her cell phone in hand, Neru hardly talks or sings. She is well known for being either in the band or a dancer. Her most popular role is that of the cell phone composer in the video "Triple Baka"
Neru like Haku appeared in Project Diva and Project Diva 2nd. Both girls received two outfits and a swimming suit along side their default costumes.

Neru singing in Project Diva ~f~ 

While SEGA has announced that these girls will be DLC for Project Diva ~f~ they have neither released a date or a price. 

Teto, Haku, & Neru performing "Acute" in Project Diva ~f~