First Ship's Defense System
Usagi (兎 Usagi?) are the white rabbits that serve as the First Ship's defense system.
They are white fluffy rabbits with top hats, a fuschia-colored hat with a white, slightly crumpled sash, and a cape of the same fuschia with a lavender button-up front, and a lavender brooch with light blue pearls around it. The hat also has two strings of light blue pearls making an "X" and a pink heart on it.
Their personality changes with the type of mode they're on. When they encounter Varuga, they form weapons and slice the Varuga apart, allowing no mercy. For some reason they like to help Nai, and to have their fur brushed-something that Kiichi enjoys doing.
The Hitsuji and Usagi are very similar. Although Hitsuji, sheep, are more commonly seen, they both manage security and communicate with each other. They are meant to make Circus safe and to protect people, and they also try to keep people happy- they are programmed to recognize signs of human happiness.
The true extent of the Usagis' abilities is not shown. So far we know they can weld and fix things, fight, and go berserk. We also know that they have different modes, and enforce security along with the black sheep, or Hitsuji.
|Circus||Nai • Gareki • Yogi • Tsukumo • Hirato • Kiichi • Jiki • Tsukitachi • Iva • Karoku Arumerita|
|Kafka||Uro • Palnedo • Karoku|
|Research Tower||Akari • Ryoushi • Azana • Murano • Isosa • Tamon|
|Kuronomei Academy||Tsubame • Ranji • Shishi • Sesiri|
|Varuga||Mine • Derumen • Nima • Meiga • Kagiri • Kiharu|
|Defense System||Hitsuji • Usagi • Yukkin|
|Other||Erishuka • Yotaka • Tsubaki • Jingu • Kana • Tokitatsu • Kiripon • Yanari • Rissun|