MikuLeek

MikuLeek is the cargo ship between Hatsune Miku and a leek from the Vocaloid fandom.

Canon
Miku and the vegetable, leek, have quite the history. In Miku's early development, Crypton was thinking about giving each Cryptonloid a character item. This is the reason why lots of promotion, art, and Vocaloid music features Miku with a leek. One of the most well known Vocaloid songs using Miku and a leek, is the song Ievan Polkka.

Project Diva
As mentioned previously, Miku is often seen with a leek and this includes the Project Diva games. In the song, Miku Miku Ni Shite Ageru by Ika, MV you can see Miku playing with leeks during a part of the song. Another thing to mention is the Project Diva opening movies. In multiple of the opening movies, you can see chibi versions of Miku holding leeks throughout the movie. You can also see Miku holding a leek during the tutorial.

Other Songs
One of the other few and well known Vocaloid song involving Miku and vegetables would be PoPiPo by LamazeP. This song features Miku trying tell sell the viewer vegetable juice. In the song, Miku dances, parading around her famous vegetable juice claiming it only costs "100 yen". You can also see other famous Vocaloid characters dressed up in vegetable themed costumes. Although not directly related with leeks, this song shows Miku's passion for vegetables and healthy diet.

Fanon
MikuLeek has become a bit of a meme within the Vocaloid community, especially during the early days of the fandom. Lots of fanart during the time involved Miku holding, hugging, playing, ect with a leek. MMD videos around the time also included Miku being obsessed with leeks. Along with the fan creations, Cyrpton and Sega have also used Miku and leeks together as a promotional thing.

Along with leeks becoming a meme due to the popularity of Ievan Polkka many parodies were created after it. Other characters related to Vocaloid have their own versions of songs related to them obsessing over their character item. As an example BananaLen is another popular cargoship that is similar to MikuLeek.

Fandom
FAN FICTION

Trivia

 * The character Hachune Miku was created as a version with Miku holding a leek, representing the song Ievan Polkka.
 * There is a Leek themed Miku Nendroid.
 * Many Miku figurines have a leek as an accessory for Miku.