Modorin

Modorin is  Run's pet which is a Skunk of Youth and it's actually found in Nana's Cyber Safari together with other Skunks of Youth. It looks a skunk but its colour is blue or purple, half violet and yellow. It has black eyes and a crest in its pate whose style is punk and yellow-coloured. And it also has yellow fur in its back and its chin. It appears from the chapter 19 of To Love-Ru Darkness with a collar which has such as a stone. It seems to be a very shy animal as every time moves closer to someone and it lets out gas for self-defence. By which Run said it is very lazy as she says that it sleeps all day.

Abilities
Rejuvenating Gas: When it wants or is scared, it lets out the gas which makes the person who is exposed to this gas seemingly rejuvenating some ages. In some characters, it doesn't move back the age very much, as Rito made himself rejuvenate until 11 ages and in some other characters more rejuvenated, as in these cases of Risa, Mio and Run who get 6 or 7 ages younger. The effects of the gas only last a little bout. Agility and Speed: It is apparently very quick and agile as Lala told it for capturing it.

Plot
It debuts in the chapter 85 of To Love-Ru, which is bought via Galactic Courier, Run had brought it for seemingly making Lala younger, but when Run holds it, it ejects the gas making Run younger. After it appears outside of the achool and makes Lala younger, immediately in which she is turned into a younger girl, then it enters the school and is found with Haruna which seemed very lovely and also Yui saw it without thinking because someone brought her pet to the school but when also saw it that it looksed very lovely and when Rito suddenly appeared within screaming and making Modorin seemingly scared and let out the gas to Yui and she is converted into a younger girl. And then it began to turn everyone in the world into young. The gas is brought to Risa, Mio Honekawa (but dropping to be younger and attractive), and everyone in the school except Rito, Haruna and Mikado. Later on, it appears sleeping above the tank of the school, and being captured by Run.

It also appears in the chapter 19 of To Love-Ru Darkness, walking down the street when it meets with Rito and Yui, and he attempts to capture it but Modorin is scared and lets out its gas against them and runs away. Then it seems to turn Momo, Mea, Nana, Yami, Mikan, Haruna, Saki, Rin, Aya and Maron into younger children and the principal is made younger than them. Rito talks with Run and Run reveals that this Skunk of Youth is called as Modorin. Meanwhile it hides in shrubs Rito finds it, and then Modorin jumps over Rito and Yui arranging to stay in a perverted situation and Modorin runs away without gas. While it flees, climbs a wall and almost falls, but thanks to Rito, it is saved. Later on it is back to Run, and she regrets for its difficulty to look after it, and Nana suggests that it will leave to her D-Dial. In the chapter 21, it is considered to be in Nana's Cyber Safari together with other Skunks of Youth.

In anime, It appears in the episode 5 of Motto to Love-Ru and in the ova 2 of To Love-Ru Darkness.