Ren Nikaidou is a wolf who was once the head of a group known as the Gabriel Ratchet. After a strong showing from Yō, he declared him as his rival, though has a lot of problems when associating with him, especially because of the incident where Yō got the nickname of pervert which he personally helped spread. Despite being unwilling to have anything to do with Yō, he is somewhat similar to him in personality and preference; he has a crush on Matsuba (as Yō does with Sen) and often blushes whenever an awkward situation is presented to him (just as Yō does when he starts fantasizing). He often associates himself with Ayame as they are from the same area and will usually work with her to gather information about other wolves. Despite being a noteworthy wolf, he has yet to gain a proper nickname.
Voiced by: Kazuyuki Okitsu
Wikipedia
