Oku-chan

Oku-chan is a terrestrial Kyuu Octopus of the planet Hacchi and one of Nana's animals.

Appearance and Personality
It looks like a big red-colored gigantic octopus with white-colored horns at its head. In To Love-Ru Darkness, it become more bigger.

Despite the size, it's actually quite friendly.

Abilities
This octopus can help to increase bust size of the girls sucking their breasts with its cups.

Plot
Oku-chan debuts in the chapter 156 of To Love-Ru (adapted in the episode 8 of Motto To Love Ru). Nana, together with Haruna and Oshizu, try to figure how make their breast bigger and found about this octopus on galactic internet. Nana has already one and summon Oku-chan from her D-Dial. The octopus then begins to suck the breasts of Haruna, Oshizu and Nana with its suckers. But the girls don't like this methods and tells it to stop.

He reappers twice in To Love-Ru Darkness, both times together with giant squid Gesoruski. In chapter 7, they are accidentally summoned from Nana and, in a display to affection, they grab Rito and Haruna putting them in a naughty position. In chapter 50, setted in the Cyber Safari, Oku-chan is along with the other animals which chase the queen Sephie after to be accidentally enraptured by her beauty.