Eri Shiina/Relationships

Yuzuru Otonashi
Shiina holds Otonashi in high regard following the events of Angel Beats! and because of this, she's held a special view for him to a comparable level with Yuri, understanding him to be perceptive. Because of this, she is envious Otonashi to the point of attraction. She initially refused to participate in Operation Medical Watch, citing that it wasn't their place to bring him back into the battlefront once more and that if he were to rejoin, it would be of his own free choice and not because they asked him to.

Unfortunately, as Otonashi spiraled further, Shiina was eventually at a loss and conceded her terms of not participating in the operation in order to bring Otonashi back into the Battlefront, where he can remain a lot closer to her.

Shiina has trained Otonashi on multiple occasions in close quarters combat. They exchange information often, Otonashi exchanging his medical knowledge to receiving her close quarters combat techniques and moves. As a result of this, she developed a mutual respect for Otonashi, going out of her way to include him in her personal operations, despite Yuri's disagreements.

She has began to see Otonashi in a different light following Chapter 12, where Otonashi decided to give her a stuffed toy puppy as a way to thank her for training and dedicating her time to training him. She blushes in embarassment and couldn't dare to look him in the eye as he smiled at her.

As revealed in Chapter 13, Otonashi is held in a completely different standard as she easily found herself manuevering through his house carelessly and was able to sleep in his bed half-naked without harboring any sort of embarassment or decency. This is a large indicator that she sees him as someone she can completely trust. It can be a fair assumption that Otonashi also holds her to that same degree. They continue to hold this relationship when she proceeds to promptly move in with him, although it can be speculated that she is either developing romantic feelings or she is looking to protect him.

Yuri Nakamura
Shiina holds a large amount of respect to Yuri. The respect mostly comes from the events of Angel Beats! in which Shiina immediately thought that the battlefront in it's early stages were hostile. After being defeated, Yuri was the first person to show her respect and mutuality. Unaware of the world around her and it's meaning, she was convinced to join the battlefront, effectively becoming one of the strongest members of the Top Brass.

Being one of the only females in the Top Brass, Yuri places a ton of trust into Shiina, entrusting her with some of the most daring missions that others would most likely not succeed in. Those missions varied, but mostly remained along the lines of stealth.

Over the events of A Step Closer, Shiina has been led to doubts in Yuri's morals and opinions. While she still believes in Yuri's abilities and friendship, a major setback in their relationship was caused by the discussion of bringing Otonashi back to the battlefront in real life, in which both of them held different views. As this was the first time Shiina ever had some sort of disagreement, she herself was conflicted with what was right and wrong before setting ground on Otonashi's side.

Eventually, a discussion was held between them and Yuri made a deal: They are to watch over Otonashi and make his life as easy as possible rather than directly recruit him like everyone else. Shiina had agreed to this, but was still skeptical of Yuri's intentions. When the time came of Hatsune's death, Shiina found herself taking over multiple shifts that belonged to Takamatsu, ready to intervene in the case Otonashi's mind spiralled to the point of committing suicide. Unable to see Otonashi suffer, Shiina silently resigned her previous feelings.

Following Otonashi's return, there hasn't been any recorded instances of Shiina and Yuri having conflict, but it's fairly certain that Shiina holds some form of contempt for her.

Hideki Hinata
Being the co-leader of the battlefront, Shiina would report to Hinata if Yuri was absent during an operation or on a personal mission. Although they don't hold much views of each other, Shiina sees Hinata as a trustworthy but foolish comrade.

Hinata holds a degree of respect and fear for Shiina, due to the events of their first meetup.

Masami Iwasawa
Other than the occasional meetings conducted by Yuri, Shiina doesn't make an attempt to contact Iwasawa for any particular reason.