Kakeru Ryūen/Relationships

Kakeru is a delinquent of Advanced Nurturing High School who causes trouble for anyone unfortunate to cross paths with especially those of the lower class at the school.

Albert Yamada
Albert is one of Kakeru's classmates who serve as one of his men, mainly his enforcer. He is very loyal to Kakeru and is willing to put aside his personal feelings and attack Daichi Ishizaki for failing in his task.

Mio Ibuki
For unknown reasons, she is always by his side as one of his followers however, it is clear she doesn't enjoy the pain he inflicts on others as shown when she flinched after he smashed a glass bottle on the head Daichi Ishizaki or when he had Albert Yamada beat Daichi and the others for their failure in getting Ken expelled.

On the cruise, he was angrily confronted by Mio who made it clear that she couldn't stand nor approve of their cruelty and wanted them to stop their actions. He ignored her words by treating her like a plaything and made advances on her which infuriated her for his callous acts. After he tried to leave, she called out to him but Yamada intervened and Mio was angry and disappointed that he manipulated him into being his pawn before Yamada threw her down and Kakeru grinned at her pain.

Hiyori Shiina
Not much is known about their relationship except that he seems to trust her. She acts as an advisor to him and so he treats her with respect not shown to his other classmates. He greatly values her worth and intelligence she brings to their class and cares for her to a certain degree. She doesn’t agree with how he runs the class but doesn’t go out of her way to go against him. She does not associate with him more than necessary on the condition that he wouldn’t bother her during her private leisure time.

Other Classmates
He is the representative of his class, he and his gang make sure that his orders are followed as Ryuen enjoys leading his fellows by fear.

Arisu Sakayanagi
They appear to be familiar with each other as Kakeru remarked on how it looked as if she established her rule in the school very quickly. He swore to her that he will take down all the classes including hers so that he could rule the school as she found his declaration interesting and accepted the challenge. Initially he treats her as the last and most formidable opponent before he could establish his dream of ruling the school however Kiyotaka soon took that role. He still regards her as a threatening presence in the school and doesn’t go out of his way to make an enemy out of her lest he incur her wrath.

Kōhei Katsuragi
Not much is known about their relationship, in the survival test the two are shown forming an alliance to take down the other classes. When Katsuragi attempted to shake Kakeru's hand as a sign of agreement, Kakeru told him not to overstep his boundaries by reminding him of his failure to reach the Student Council. He soon walked off as Katsuragi became angry with his unnecessary remark, showing the two have a mutual disdain towards one another.

Honami Ichinose
It is shown in Episode 3, that he knows her due to her immense popularity in the school and she was familiar with him. He greeted her after she finds him and his gang harassing Ken Sudō. When he claims his group were acting in self-defense, she saw right through his lies and reprimands his cruel actions. She soon threatens them by stating that if they didn't let Ken go immediately, she'd had no choice but to get security. He complied to her demands without protest, trying to avoid unwanted trouble with someone who has a huge following. As fellow leaders of their respective classes, he treats her as a huge threat and some level of respect not given to even his classmates. After defeating her in one of their class battles, his impression of her decreased and he became more confident and arrogant whenever she’s around. On the other hand, she feels dejected for her failures and seeks to clean her record by successfully beating him in the future.

Ken Sudō
In Episode 4, Ken and Kakeru are shown to be on hostile terms as Kakeru and his gang made fun of Sudō for being of D-Class. His words easily provoked the latter who would have attacked if Kakeru's men held him down leaving at Kakeru's mercy. Kakeru approached Ken taunting him over how he will be expelled for failing the upcoming test and Ken flinched when it appeared Kakeru would attack only for him to just flick his forehead. Kakeru took joy in watching Ken suffer and his torture of him would have escalated had Honami Ichinose not intervene and threatened Kakeru with security. Kakeru had later set Ken up to be expelled in as he had his men attack him but made it look like Ken was the aggressor in the situation.

His plan failed due to the intervention of Kiyotaka Ayanokōji and Suzune Horikita who defended Ken and made Kakeru's men withdraw their complaint. Kakeru was infuriated his plan to get rid of Ken failed and punished his men for not carrying out the plan.

They met again at the pool, where in spite of their dislike for each other, Kakeru did not try to harm Ken in anyway but was annoyed with his acts of stopping from proceeding to the change room.

Suzune Horikita
No direct interaction had been made in Episode 6, though Suzune played a role in stopping his plans of getting Ken Sudō expelled and he questioned his men on who set them up and they said it was Suzune. In Episode 7, he spots her giving a speech to everyone at the pool recalling her as the girl who foiled his plans and smiled meaning he had plans for her.

They formally met on the school's cruise ship in Episode 8, Kakeru found Suzune, sitting at the bar, and addressed her by first name, giving hints that he is aware of what she did to get the complaint withdrawn. Suzune, who seemed to be very disgusted by his presence, found his arrogant attitude off-putting and told him to keep away from her but he responded by taking a picture of both her and Kiyotaka Ayanokōji, after claiming to be a fan of hers and stating he had already made plans to take care of her personally, he tells her to look forward to it.

In Episode 10, he was seen flirting and trying to make advances towards Suzune, as she and Kiyotaka were scouting class 1-C, stating that he will prepare a special tent just for the two of them, and that he will make her taste real heaven, as she glanced back at him presumably creeped out, disgusted and probably freaked out, after she is seen leaving with Kiyotaka, stating that being there any longer than they should have will just make her even more sick.

Kiyotaka Ayanokōji
No direct interaction was made in the first season of the anime, although they saw each other face to face in the survival test.

While Kakeru did not appear to think much of Kiyotaka unknown to him, Kiyotaka played a role in helping Suzune foil his plans.

In Season 2, Kakeru recalls Kiyotaka being around Suzune and starts to ponder if he might be the mastermind of the class and ponders on it, despite Mio's words. When he held Kei hostage, he was pleasantly surprised to see Kiyotaka is the mastermind. He began to mock him on being boxed in by his gang only to be impressed by his stoic nature and witness him defeat Daichi and Albert. He remarked on how Kiyotaka was more than he appears.

Kikyō Kushida
There was no interaction between them in the first season.

In the second season, she formed a temporary alliance with him to get Suzune and Kiyotaka expelled. To that end, Kikyō leaked information about the class to him and he promised to aid with her endeavors. Kakeru did not seem to mind her duplicitous nature seeing it amusing. he also addressed her by her first name which Kikyō didn't seem to get bothered by it.