Hizashi Yamada/Relationships

Shota Aizawa
He has known Shota for a long time and, along together with their mutual friend Oboro Shirakumo, they were close friends in school together. Hizashi was the one who eventually gave Shota his hero name "Eraser Head". In spite of their differing personalities, they work together at U.A. High as close friends and colleagues.

He also knows him quite well, being sure that Shota would accept the offer of being a professor at the U.A. despite his initial refusal. Hizashi is shown to enjoy picking on Shota as he calls him a terrible teacher, in a joking way.

Hizashi has always been there to cheer and support Shota, especially in difficult moments, such as after the tragic death of Oboro Shirakumo during their second year at U.A,, as well as when they discovered that All For One and Garaki had used his friend's corpse to create the Kurogiri.

Midnight
Hizashi has always had a good relationship with Nemuri. They have been friends since they were students at U.A., with Nemuri being his senior. They used to get together along his classmates Shota and Oboro on one of the rooftop of the main building to talk.

When both became professional Heroes they continued to maintain contact, becoming teachers at the U.A almost at the same time, continuing their friendship.

Oboro Shirakumo
Oboro was one his classmates at Class 2-A and, along with Shota, one of Hizashi closest friends. It was very common to see the three students together, having lunch on the rooftop of the U.A and talking about various matters.

One of the reasons for their friendship is that they both had many things in common, being both boys with a positive, jovial and energetic attitude, although Oboro never quite reached his excitement level. Both were also very prone to make jokes, especially at Shota's expense, who used to say that him and Oboro shared the same two brain cells.

Hizashi mourned the loss of his friend along with Shota.

He is especially horrified to hear he became Kurogiri and shocked to see it confirmed after he breaks through to give information.

Sensoji
Sensoji was a student of Class 2-B when Hizashi was still a student. There was a certain dislike between the two due mainly to the animosity and rivalry that Sensoji professed against Aizawa. Hizashi doesn't even hesitate to tell Sensoji that he's a simple-minded.

Even so, they carried out their Hero Work-Studies in the same Hero Office, and formed a very strong combo when they worked as a team.

Kyudai Garaki
Hizashi despises Kyudai Garaki from the moment he discovered that he and All for One had desecrated the corpse of his friend Oboro to use in his experiments and turn him into Kurogiri. Both he and Shota were deeply shocked when they learned this, being especially harsh on Shota to the point of crying. Therefore, Hizashi is more than willing to participate in the raid to the Jaku General Hospital to arrest Dr. Garaki, and in this way derail All For One's plans.

When the heroes storm the hospital and arrest Kyudai, Hizashi angrily demanded to answer why he is using his powers for evil, only to find out that actually the doctor wasn't the real one. Later, when they raid the secret laboratory under the hospital, they meet Garaki again, and when the opportunity presents itself, he uses DJ Punch on Kyudai Garaki not only to be sure he's the real thing, but also as revenge for what he did to Oboro and making his friend Shota cry.