Jin Bubaigawara/Relationships

Tomura Shigaraki
Twice respects Tomura as the true leader of the League of Villains, and tends to obey most of his commands. This is evident during the Internship Arc, per Tomura's order for Himiko Toga and Twice to temporarily join the Yakuza, eightfold cleansers. Twice still follows Tomura's orders to assist Overhaul and the Shie Hassaikai, despite having a deep hatred toward Overhaul. Twice trusts Tomura enough, to even rip off his mask, to demonstrate how visibly upset he was over his decision to have more Vanguard Action Squad members engage with Overhaul, despite Magne being killed and Mr. Compress injured from their last encounter.

Dabi
Dabi is shown to have no problem working with Twice and seemingly not annoyed by his antics and contradictory personality. In return, Twice has confidence in Dabi's strength and rebuffs his doubt about his own strength.

Himiko Toga
Twice and Himiko are both members of the League of Villains and get along pretty well. During their internship in the Yakuza organization, Himiko has shown a great understanding of Twice's feelings about them working together with the Yakuza. She also patched up his mask to stop him from splitting.

Her kindhearted treatment in that stressful situation caused Twice to develop a little crush on her.

Magne
Both are members of the League of Villains. Twice becomes indirectly responsible for Magne's death when he brings Overhaul to the league. Twice feels remorse for Magne's death at the hands of Overhaul and vows to take responsibility for killing Overhaul. He gets visibly angry when she was misgendered by her killer.

Mr. Compress
Both are members of the League of Villains. Twice becomes indirectly responsible for Mr. Compress losing his arm at the hands of Overhaul. Twice protects his fellow member, vowing to kill Overhaul for what he did to Mr. Compress and Magne.

Overhaul
Twice is the one who introduces Overhaul to the League of Villains. Initially, Twice is impressed by Overhaul's display against Team Reservoir Dogs and decides to recruit him.

His impression of Overhaul changes drastically when Overhaul kills Magne and destroys Mr. Compress's arm. Twice holds a grudge against Overhaul for what he has done to the league, vowing it is his responsibility for what happened and he would be the one to kill him.