Shuichi Iguchi/Relationships

Stain
Spinner has complete and total respect for the hero killer. It was Stain's words that inspired Spinner to become a villain. Spinners villain costume is very similar to that of Stain.

Following Stain's incarnation, Spinner has taken it upon himself to continue Stain's quest to rid the world of false heroes. Openly stating that the League of Villains keep Stain's principles in mind when planning to kill someone.

Tomura Shigaraki
Spinner has little faith in Tomura and his ability to lead the League of Villains. He has openly questioned how Tomura and the League will help him bring Stain's goals to fruition.

Magne
Spinner and Magne have been known to have their disagreements.

Magne wanted to just kill without rhyme or reason, while Spinner thought it important to think about who to kill and who to spare in accordance with Stain's code of conduct.

Izuku Midoriya
Due to Stain not only sparing, but saving Izuku, Spinner has total respect for Izuku and his potential as a future hero.

Spinner even went as far as to protect Izuku from being attacked by his fellow villain, Magne.

Mandalay
Spinner and Mandalay are enemies, as standard for heroes and villains. Spinner considers Mandalay to be a false hero and Mandalay is mad at Spinner for invading the Forest Training Camp and putting the students in danger.