KEI was
given the concept Crypton intended, their approximate ages, an image of
mirror, and an image of androids, but was not given any other directions
when he was asked to illustrate Rin and Len by Crypton, as Kei had
already illustrated Miku before. Rin was the first one to be illustrated
and Len was made to match her, following Crypton's concept. Their leg
parts are designed to mimic speakers.[1][2] The keytar
Len is often featured holding in merchandise is a Yamaha KX5 of which
both the Kagamine designs take certain design elements from.
As they were under development, Crypton had the concept of making
a pair of male and female voicebanks. The first idea of the concept was
twin voices of a girl and her mirror image of opposite gender, just
like twins. [3]
CFM had an intention to distribute them as twins, but this was not
adopted either. After seeing many works that depict their relationships
differently, Crypton announced on a magazine interview that those would
meet their ideal. Crypton announced that they are neither siblings nor
lovers. [4][5] During Append production, Wat described them as one soul between the 2 of them, and stated he is to blame for that.[6] During the boxart for the Append, Wat described it as making the pair seem like Twins.[7] It was due the fetal position they were in.[8] Wat also wanted the Appends to have a sense of transparency about their design to give a transparent feeling.[9]
The "transparency" was in reference to their hearts in clarification
on what he meant due to confusion over what he meant by this.[10]
Act 2 Kagamine Rin image (left) and original design (right) side by side
As well as a new set of vocals during the Act2 release, KEI took the opportunity to fix art flaws in their artwork.
Kagamine Rin's introduction artwork
Rin has "Act2" on her arm under her "02" tattoo.
Rin's top was changed in the introductory image between
versions around the armpit area. Frills were added to the bottom of her
top in Act2
Her shoulder was not correctly drawn in the original version
All the yellow bands on her outfit were made bigger on Act2.
Her fringe was made thicker above the left eye.
In Kagamine Rin's artwork, her left knee was thicker and her
right leg was too short. Kei corrected this in her Act2 version. Her
right leg position changed and so did her Left foot position
Forearms have been shortened in Act2.
The cyber-on-normal clothing design on their detached sleeves were changed from a green bar to a blue one
Kagamine Len's introduction artwork
Kagamine Len has "Act 2" on his headphones.
The cyber-on-normal clothing design on the detached sleeves were changed from a green bar to a blue one
His fringe was reshaped, other strands were adjusted as well
Len's face, particularly around the cheekbones, have been reshaped.
His left knee has a minor tweak
Boxart changes;
Kagamine Rin's leg position was changed in their boxart so it
was lifted up off the ground, the only way the previous position would
have worked was if her leg was deformed or broken.
Rin's body itself compared to the length of her legs is shorter then in the original boxart, the legs longer.
Kagamine Rin's knee is rounded instead of sharp
Both had the cyber-on details changed on their detached sleeves
Their Append design and the Official Illustration of those ones were made by オサム (osamu) .
Continuing the tradition of the Item War Internet Meme,
many items were preposed for the pair. In the end, Len's item was a
Banana because his hair was commented to resemble a bunch of bananas,
while Rin's item was an Orange since her bow gave the impression of
orange leaves. Before her release, Rin had the Road Roller assigned to
her by accident in a video that recieved many views suddenly on December
1, 2007. Kagamine Len had yet to be revealed at the time of the Road
Roller meme