Ren Elsie Jewelria

Ren Elise Jewelria is an childhood friend of Lala and the boy version of Run Elise Jewelria. As Ren and Run are royalty from planet Memorze, they can change gender in mind and body upon triggering a specific stimulus. In their case, a sneeze. Ren likes Lala, while Run likes Rito. Ren hates Rito because Lala likes him, while Run hates Lala because Rito likes her. In Chapter 9 of To Love-Ru Darkness, Run and Ren permanently separated into two separate beings after reaching 'adulthood'. His hairstyle is similar to Chaud from the video game series MegaMan Battle Network.

Lala Satalin Deviluke
Ren and Lala have been friends sence childhood, Lala would acasionly force Ren to test out her inventions and make him where dresses, dispite all this he didn't seem to mind in the end because was deeply in love with her (but Run did and it caused her to hate Lala). Lala agread to marry Ren if he becomes a real man although Lala doesn't remember this because of her lack of attension span but Ren still tries any way to win her over.

Rito Yuuki
Ren see's Rito as his rival because of Lala's love for him so he constanly tries to best Rito on who's more manly even at poinless challenges. Ren one time accindently kissed Rito which caused Ren to dispise him even more but caused his female counterpart to fall in love with Rito, something Ren blames him for.

In To Love-Ru he seems to have rarely be seen trying to act manly to impress Lala and challeging Rito (it's unknown if he has accepted Rito as Lala's lover or still tries off scene). Ren once told Rito that Lala is very kind and caring person and asked him if he is keeping her as insurence in case things with Haruna don't work out, Rito then starts to wonder about what he said.

Run Elise Jewelria
Run is Ren's female counterpart who's shared the same body sence birth until they reached "adulthood" causing the two to permanently split bodies. It was through him that she expirienced the kiss he had with Rito, the cause of her love for him.

Kyouko Kirisaki
Ren doesn't seem very close to Kyouko as Run does but is awere thier ability to swap mind and gender through a sneeze. She has helped them from changing when she and Run are performing together, this is no longer the case as the two have separate bodies now.