Jin Bubaigawara/Relationships

Tomura Shigaraki
Twice respects Tomura as the leader of the League of Villains, and tends to obey most of his commands. This is evident during the Shie Hassaikai Arc, per Tomura's order for Himiko Toga and Twice to temporarily join the Yakuza. At first, Twice refused to assist Overhaul and the Shie Hassaikai due to what they had done to Mr. Compress and Magne and feeling guilty about it. He begs Tomura not to let him go. Tomura takes off his mask revealing a calm, decided face. He tells Twice that he's going to help Overhaul for him, himself and the rest of the League while noting that he knew the Shie Hassaikai were never interested in being equals but want to undermine the League. Tomura recalls when Twice said someone will pay for Magne's death and says that helping Overhaul is one way and that he believes in Twice.

These words inspire Twice to be himself and do his best during his time as a Yakuza which inadvertently leads him, along with Himiko, to 'run amok' as Overhaul had feared. In being himself, Twice manages to obtain the revenge he wished for.

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 shown to get along well. During their internship in the Yakuza organization, Himiko shows a great understanding of Twice's feelings about them working together with the Yakuza. After his masks rips during a confrontation with Sir Nighteye, to show half of his face, Twice begins to split. Himiko repairs his mask with and reminds him that if they don't cooperate they will never get the chance to get revenge for Magne.

The two decide to 'do things their way' which results in them sabotaging the Yakuza's plans by angering Mimic to losing his concentration leading to his capture as well as leading Ryuko's squad to aid in the battle against Overhaul.

The sympathy shown to him by Himiko during the their time as Yakuza causes Twice to care for her. He calls her his soulmate after she repairs his mask. Twice later questions if he can have a kiss as the they look for an exit out from the underground paths. He also dresses her in the fake jewelry stolen from the Creature Rejection Clan.

Magne
Twice became indirectly responsible for Magne's death when he brought Overhaul to the League. Twice felt remorseful for Magne's death at the hands of Overhaul and vowed revenge. He got visibly angry when she was misgendered by Overhaul.

Mr. Compress
Twice feels responsible for Mr. Compress losing his arm at the hands to Overhaul. Twice vows to get revenge for what Overhaul did to Mr. Compress and Magne.

Giran
Twice thinks Giran is a 'swell and wonderful guy' and likes that he's been looking out for him since joining the League. When it is revealed that Giran is captured by Redestro and his Meta Liberation Army Twice becomes angered and demands Giran's location and safety.

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

However, his impression of Overhaul changes drastically when Overhaul kills Magne and destroys Mr. Compress's arm in their first meeting with the League. Twice holds a grudge against Overhaul for what he did to the League and feels responsible for putting the League in jeopardy.