Roppa

"'His name is Roppa and you better call him that!' - Hinokimaru"

Roppa is a nekomata that is first seen on Akiyuki Takehara's way to school. He is later found and taken in by Kobako and Hinokimaru.

Appearance
Roppa is a green nekomata, which is a creature that looks similar to that of a bunny.

Biography
Roppa is first seen crossing a street in front of Akiyuki while he is on his way to school. Akiyuki almost hits Roppa, which causes the nekomata to freeze up before dashing into an alley way. Once Akiyuki decides to go down the same alley way, he apologizes for scaring Roppa.

Roppa is next seen on the docks of Sentan Island with Kobako and Hinokimaru, who have appeared to found him after he became lost. Together, they beg Ishuu Benikawa to let them keep him. Though Ishuu angrily protests, she apparently gives in as Roppa's next appearance is aboard the Zanbani. For unknown reasons, Roppa walks up to and bites Akushiba while he's standing watch outside of Nakiami's room. Once Akushiba tears him off of his leg and drops him to the floor, Roppa immediately scampers up into Kobako's arms and stays there for the duration of the scene.

Kobako
Kobako is Roppa's owner, along with Hinokimaru.

Hinokimaru
Hinokimaru is Roppa's owner, along with Kobako.

Akushiba
Roppa seems to dislike Akushiba for reasons unknown, as their first onscreen interaction is Roppa walking up to and biting his leg.