Mina Ashido/Relationships

Tsuyu Asui
They are often seen together and are great friends with each other, being on a first-name basis with one another. Tsuyu congratulated Mina for making it to the tournament, even though she was angry about her own failure. Mina was shown to be amazed by Tsuyu's internship and called her time there cool.

Denki Kaminari
Kaminari and Mina are often seen together and are friends. They somewhat bonded due to them being the worst students in class in terms of grades. They were partners during the exam before the training camp.

Yuga Aoyama
He seems to interact with her more than with his other classmates. She often teases him about his stomach aches as a result of his Quirk and also managed to beat him with ease during the U.A. Sports Festival Arc. However, she did look apologetic when she saw that he was dazed from her punching and knocking him out.

A running gag is her interrupting him when he is arrogantly speaking about himself, often making him mad.

Kyoka Jiro
They appear to be on good terms as they are often seen talking as seen in Vs. Hero Killer Arc talking about their internships. Both tease Ochaco for her affections towards Izuku.

Izuku Midoriya
Mina and Izuku have rarely shared important interaction together but when they do Mina has a playful bounce off of Izuku's muttering, though she doesn't seem to mind it though. Their relationship improves during the weeks leading up to the school festival, when, interested in Mina's dance skills, Izuku asks her to teach him some dance movements that may be useful to his combat style, which Mina agrees.

Mina seems to show respect and confidence towards Izuku, as when she and her teammates were nervous about their battle against Class 1-B, he was the one who encourages them, and they are counting on him to win the round. She is also shown to care for him, as she asked if his quirk was acting strange. They also work really well with each other, as both of them helped each other in defeating the Class 1B students. After they won the fifth round in the Joint Training Battle, Mina teases both him and Ochaco for grabbing onto Izuku so hard in her attempt to save him, which causes both Ochaco and Izuku to turn bright red in embarrassment. Although he is currently unaware, Mina supports him and Ochaco and hopes for them to end up together. Despite that, they are on friendly terms.

Ochaco Uraraka
They are seen together several times and are good friends. Mina was the first of the girls to figure out that Ochaco was in love with someone, and frequently teases her for it.

After the Joint Training Battle, Mina teases her again for grabbing onto Izuku so hard in her attempt to save him, implying that she knows she likes him, which causes Ochaco, along with Izuku, to turn bright red in embarrassment.

Mina eventually confirms her suspicions following a random gift exchange, after realizing that Ochaco and Izuku had exchanged gifts, with Ochaco herself affirming she's in love with him, but decided to put her feelings away for now, which made Mina feel ecstatic for Ochaco loving Izuku. After a session in which the class showcases their progress, she witnesses a touching exchange between Ochaco and Izuku in which the two bump their fists while thanking each other for making one another stronger, which she watches with much joyfulness for them.

For intents and purposes, Mina is one of the staunchest supporters and hopefuls for an eventual relationship between Ochaco and Izuku.

Eijiro Kirishima
Eijiro gets along well with Mina despite not being seen interacting with her as much as he does with some of his other classmates. The two collaborated together on Team Bakugo during the Sports Festival Arc and seemed to work well together.

It was revealed that the two went to the same middle school, during their senior year, Eijiro tried to stop two students from bullying an underclassman but did not succeed. Afterwards, Eijiro witnessed Mina step in and solve the issue by getting the student and the two bullies to break dance, diffusing the situation and ending the issue. One of Eijiro's friends points out that Mina is very athletic, outgoing, strong and eye-catching while Eijiro and the others are boring. Eijiro seems to admire Mina for this but also begins to feel self-conscious of the fact that Mina is exciting and heroic. This is reinforced later when he attempts to stop a villain on the same day as the bullying incident but his legs freeze up and Mina stops the villain instead.

Eijiro later apologizes to Mina and her classmates for not being able to do anything to stop the villain. Eventually, he and Mina take the U.A. entrance exam together and pass. On their first day of high school, Eijiro undergoes a complete appearance change, dying his hair red and spiking it up in a style that is inspired by Crimson Riot. His hairstyle also appears to have two little horns, Mina picks up on this and decides to call themselves horn buddies. It's at this moment that Eijiro vows to say goodbye to his pathetic old-self to her and swears that he's gonna be the kind of hero that never has any regrets. The past incident took a toll on Eijiro's self-confidence: the guilt was eating him alive. Mina realizes this so she teases him and lightens the mood by poking him repeatedly and telling him not to overload himself with pressure, showing concern for him in her own playful way. She asks him how he's going to move on and say goodbye to his old-self if he's still pulling the same-old gloomy face as before. Mina then smiles at Eijiro and tells him to tell her when he really does overcome his regrets from the past. Eijiro smiles back at her in agreement and apologizes.

Mina is shown to express concern for him, checking to see if he's moved on from his past yet.

Recently, Mina unveiled a new defensive Super Move called Acidman. She excitedly tells Kirishima that she created it by imitating his “Unbreakable.” Kirishima seems to be pretty flattered that he inspired the move.

In the Paranormal Liberation War Arc, Eijiro rushed through fire to save Mina from being crushed by Gigantomachia and managed to grab and take her falling 30-liter vial filled with sedative with him, it's later shown that he failed to throw his own vial into Gigantomachia's mouth due to Himiko Toga destroying it by throwing her knife at him so he grabbed Mina's falling vial and threw it into Gigantomachia's mouth while thinking about Mina's chivalrous spirit being in good hands. They survived Gigantomachia's destruction and went back to save other injured heroes together.

Minoru Mineta
Like the rest of the girls in Class 1-A, Mina despises Minoru's perverted attitude towards them and was rightly annoyed when the boy attempted to peek on her and the others through a peephole in the girls locker room.

Outside of this, Mina is well-aware of Minoru's naughty personality and has on occasion used this to motivate and or convince him. During the planning stage for the School Festival, Mina convinced a dispirited Minoru (who couldn't reach the guitar strings due to his small size) to take part by promising him a harem part in the performance, this caused Minoru to quickly come around while in joy and Mina later made good on her promise. In My Hero Academia: Heroes: Rising, Mina tricked Minoru into leaving to assist someone with lost luggage after mentioning that the girl sounded really cute over the phone. In the anime, Mina is also shown throwing a few playful teases to annoy Minoru.

During the Joint Training Battle, Mina is teamed with Minoru alongside Ochaco and Izuku. Mina is thankful when Minoru uses Grape Buckler to shield her from Nirengeki Shoda's attack, although quickly becomes angry again when Minoru used the recoil of this attack to bounce right into her chest area. Mina responds by throwing Minoru with her Acid Layback, causing him to bounce around in a combination Super Move; Grape-Pinky Combo Mineta-Bounce. Despite her team later securing victory, its clear that Mina was still angry at Minoru's scheme and demanded that Shota Aizawa punish him for being a "disgusting creep". Later on while Class 1-A and B socialise in the dorm area, Mina subjects Minoru to the Ludovico Technique as punishment for his actions.

Shoto Todoroki
When the students were moved into the Heights Alliance, during the competition with the dorm rooms, when it was Shoto's turn to show his dorm room, Mina, along with the rest of the girls except Ochaco and Tsuyu, were getting ready to see his room. Mina is one of the girls stricken by his looks, and thinks that Shoto is the most handsome boy in school.

Gigantomachia
Mina first met Gigantomachia when she was in middle school. The villain was asking her friends for directions to the Springer Agency, and when they didn't give him directions, he grew angry. It was then that Mina intervened, bravely stepping in and making up some directions. When he left, Mina quickly fell to the ground and broke down in tears of fear.

The memory of this encounter was very haunting for Mina, and during the Paranormal Liberation War, upon recognizing Gigantomachia, she instantly tenses up with fear while some tears come into her eyes, and fortunately Eijiro came in and saved her from the behemoth.