Maru-Maru Change-Kun

Maru Maru Change-Kun is one of Lala's inventions.

Maru Maru means "entire, completely or altogether" in Japanese.

It is characteristic to be the portable form of its predecessor which had the same function. It is a device which looks to have white oval body with Deviluke's symbol, yellow ornament, black triangular ornament between the yellow ornament, green screen and pink handles as fixed opposingly each other. This invention is activated by which two users grabs each handles to use this invention. and it swaps their minds to each others' bodies. This invention belongs to the inventions that changes appearance and at least once in the anime.

This invention changes its users' bodies, but the physical strength is based on their own original.

And its deminitive form called Maru Maru Change-Kun Kai Beta appears in OVA 3. This renovated version has a new function that limits the time of its change in length and the users cannot quit intentionally until its timescale ends. This renovated version changes its colours in general. It has an oval pink body with Deviluke's symbol, yellow ornament, red triangular ornament between the yellow one, grey handles which are tipped with yelow round ornaments for its switch and grey screen. Its renovated shape is nearly similar to its former one and only differs from colours.

Appearance
In the chapter 18 of Darkness, Rito and Haruna are taking care of Lala's inventions, and suddenly the invention falls off and as a respond or instinct, Rito and Haruna take the invention, as for avoiding its falldown. Pathetically, they operates it at the centre of them and this invention changes their bodies.

In chapter 18.5 of Darkness, it is used by Nana and Momo, in order to change their bodies, test it to Rito and find that he is really enamoured by Nana.

In OVA 2 Darkness, This episode is similar to be in the chapter 18.5 of Darkness, it is used by Nana and Momo in order to try it to Rito, Momo in Nana's body enamours Rito and in order to be ready to kiss, but Nana interrupts them in Momo's body and everything ends up in an argument. Obviously Rito gets confused and Nana upset but then she thinks and knows that Rito's talk reach to their mind and heart.

In OVA 3 Darkness, similar events happen as in the chapter 18 of Darkness. Rito and Haruna takes care of the inventions when suddenly Momo arrives. They say that Lala left them while she repaired Tearju's photocopier, the invention falls off and Haruna and Rito grab it before this falldown, but their mind are changed by this invention. Consequently, they happen an experience that they never forget.