Saiki Kusuo[]
Nendou calls Kusuo his Buddy after he saved him when he was framed by Takahashi. Since then, he has been sticking to Kusuo like glue, and always asks him out to eat ramen or just to hang out. Kusuo is usually a friend of Nendou who actually thinks that he's a nice guy along with their gang, despite having a scary face.
Kaidou Shun[]
Nendu and Kaidou used to fight as to who should be Kusuo's best friend, but in the end the two also got closer, and have since went out together with Kusuo. Along with Kusuo, Nendou asks Kaidou out occasionally to eat ramen whenever school ends.
Hairo Kineshi[]
For Hairo, Nendou is a rival in terms of sports and strength. Nendou is usually lax in terms of physical education, but Hairou usually challenges him, which normally results in Nendou winning.
Toritsuka Reita[]
Nendou was first ignored by Toritsuka after thinking he's the a ghost that always followed him. But after learning that he wasn't his father, the two got friendly.
Kuboyasu Aren[]
Aren and Nendou got friendly after Aren started to hangout with their small group.
Teruhashi Kokomi[]
As the usual reaction, Nendou would always react the way the usual fanboys react towards Kokomi.