Mashirao Ojiro/Relationships

Toru Hagakure
They are teamed up together as Team I during the Battle Trial Arc.

Afterwards, they are often seen talking with each other.

After the villains retreat during the U.S.J. Arc, Toru commends Mashirao's strength, while he asks where she was transported to. After she tells him she was in the landslide zone and mentions Todoroki's strength, he comments that he's glad she was alright. During the final part of the Sport Festival, when Mashirao wants to withdraw from the tournament event, she tries to persuade him to reconsider.

Izuku Midoriya
They get along well though Mashirao didn't team up with him since Izuku was a target in U.A. Sports Festival Arc. Despite that Mashirao tried to warn him about Hitoshi Shinso, Izuku also stood up for him after Hitoshi insulted him. Mashirao worried for him but was relieved he emerged from the fight victorious.

During the Vs. Hero Killer Arc, he was amazed that the latter improved on his quirk and overcame his drawbacks.

Denki Kaminari
Mashirao sits in front of Denki in class and the two are often pictured talking to each other in the background, implying a friendship. Denki seems to have a fixation on Mashirao's tail and often plays with it and pets the hair on the end of it.

Tenya Ida
The two were partnered up during the final exams against Power Loader. They were shown to work and get along well. During the exam they showed trust in each other as they used the combined power of their quirks to throw Mashirao through the gate resulting in the two passing.

Kyoka Jiro
They are often seen interacting and talking with each other in the background alongside some other classmates at times such as Toru Hagakure or most of the time, Fumikage Tokoyami. They have also shown splendid teamwork during their ambush against Nine in My Hero Academia: Heroes Rising. Kyoka was also seen shouting out Mashirao's name in concern when he was taken out by Nine. They seem to be good friends as well.

Hitoshi Shinso
Mashirao resigns from the tournament event in the Sports Festival due to being manipulated by Hitoshi, wanting to save his own pride and dignity by doing so. As a result of Hitoshi's action, Mashirao has come to dislike him because he prevented him from doing his best. When Hitoshi approaches Izuku, Mashirao warns Izuku not to respond to his provocations.