Midori

Midori Chan is an animated plant that the Sisters keep on a railway cart that they use as a base. Ritsu can communicate with Midori make her move her vines for mobility and fighting.

Appearance
A trunk of a tree with green round fruits.

ONA
In the ONA Midori is a big tree located in the middle of the city. She can pump water from regions where bell-like markers were placed. it is also implied that Wakaba was a fruit of her.

Trivia

 * Midori means "green" in Japanese.
 * Midori shares her name with the green Kemurikusa
 * Ritsu found Midori on the wall of Island six.