Who Is Rin Kagaimine And Who Is Len Kagamine?

Kagamine Rin & Len (Japanese: 鏡音リン・レン), officially code-named CV02, are a pair of Vocaloid software developed by Crypton Future Media, headquartered in Sapporo, Japan. Their official moe anthropomorphism consists of a pair of twin vocals, a boy and a girl, respectively named Len and Rin. They use Yamaha Corporation's Vocaloid 2 and Vocaloid 4 singing synthesizing technology. Their voices are samples of the voice actress Asami Shimoda. They have performed at live concerts together, as they are each other's mirror image. Their official code name, CV02, refers to their position as the second Vocaloids made by Crypton Future Media for their "Character Vocal Series" (abbreviated "CV Series"), succeeding Hatsune Miku (code-named CV01) and preceding Megurine Luka (code-named CV03). Notice the number 02 on Rin's left shoulder in her official artwork. Rin & Len were developed by Crypton Future Media using Yamaha's Vocaloid 2. Their voices were created by taking vocal samples from voice actress Asami Shimoda at a controlled pitch and tone. They were the second release within the "Character Vocal Series," (abbreviated "CV Series") which included Crypton Future Media's other vocaloids, Hatsune Miku and Megurine Luka. Rin was the first to be illustrated and Len was made to match her, following Crypton's concept. They received mixed results from producers because compared to Hatsune Miku, they were considered much harder vocals to use. Asami Shimoda noted that she often received comments from Vocaloid fans that Rin's voice echoes within their head and makes them feel dizzy, while Len's higher ranges were not favored by those not fond of the pair entirely. During development, Crypton's initial concept was to make a pair of female and male vocals. The first idea of this concept was twin voices of a girl and her mirror image of opposite gender. Crypton Future Media had the intention to distribute them as twins, but this idea was not adopted and their relationship was left unconfirmed. Merchandise companies such as Goodsmile will use "twin" in their description of the characters on some products or not use the descriptor in other products. Crypton's official website advertises the two as "powerful and charming twin vocals". The reference is in the vocals however, and not the characters themselves. During Vocaloid 2 Append production, Wataru Sasaki described them as having one soul between the two of them, having only one append shared, POWER. For their appends, Wataru wanted them to have a sense of transparency with their design. In clarification to what he meant by this, he stated the "transparency" was in reference to their hearts. For the V4x design, Rin was given a more silver/whiter look to make her appearance more refreshing. The design also was based more on the EOS B700 rather than the Kx5 because of it more whiter appearance. More synthesizer base music symbols were used in addition. - stolen from wikipedia like always