Arata Kasuga/Relationships

Hijiri Kasuga - A mage from Royal Lieber Academy who originally posed as his cousin and took care of him in place of his missing in place of his parents. Despite the two not being blood related, they have an extremely strong bond built over time and care very deeply for one another. When the Breakdown Phenomenon was destroying their hometown, Hijiri prioritized saving Arata first, kissing him before allowing herself to be disintegrated. As a result, Arata, desiring to save her, chooses to become a magician on the small chance of bringing her back. Even when revealed that they are enemies, they are still joyful to see each other and remain on friendly terms despite thier circumstances. They both have a strong desire to protect each other; Arata wants to bring back Hijiri from being trapped in time and space, while Hijiri wants to save him from his fate as the Magic King who will eventually destroy the world.

Trinity Seven
Lilith Asami - As the first mage (besides Hiziri, whom he didn't know was a mage initially) and member of the Trinity Seven that Arata encounters, Lilith was the person responsible for introducing Arata to the magic world. Initially investigating a Breakdown Phenomenon site, she was surprised to discover the area undestroyed. Investigating further, she discovered Arata as the source and demanded that he give up his grimoire. Refusing, Arata instead convinced her to make him a magician and as a result, enrolled him at the Biblia Academy. Out of the Trinity Seven, Lilith is probably the closest to Arata and interacts with him the most. As his teacher, Lilith tends to act strict towards him on his behavior and actions. Although, she often becomes very flusterd by his perverted teasing and antics, causing her to become extremely embarrased or angry, sometimes even act out violently. Interestingly, Levi once stated that her personality was more of an ice queen before meeting Arata, hinting that he was someone special to her. However, despite her frustrations, Lilith deeply respects and cares for Arata, willing to support and protect him. Arata, likewise, also feels the same; he considers her and rest of Trinity Seven just as precious to him. It is implied that Lilith may have feelings for him, often blushing when around him and becoming jealous whenever he interacts with other girls.

Levi Kazama - Levi was the second member of the Trinity Seven Arata meets upon becoming a mage. Arata first discovers Levi hiding on top the ceiling after he transfers to Biblia Academy. Being just as crafty and perverted as him, she and Arata easily got along with each other. Since their initial meeting, they have become good friends as a result of their similar personalities. Their usual interactions often involve teasing others with perverse jokes and situations. Levi holds great expectations of him, and is always willing to provide support for him, often being the one to explain new things to him. Although, it is unclear whether or not she has feelings for him, she does enjoy being with him and commonly teases him as will, causing him to blush many times. They both care and are willing to fight for each other, becoming concerned when the other is not well. Notably, Levi is also the only member left of the Trinity Seven that Arata has not seen naked, which Arata considers his "final frontier".

Mira Yamana - Arata first saw Mira returning from a mission with Akio upon transferring to Biblia Academy. They would later officially meet when Arin caused him to create a Breakdown Phenomenon. Mira, as head of the Grimoire Security, deemed him as a danger and ordered Akio to destroy him, although her attempt failed due to Yui's intervention. Mira would eventually allow Arata to live after he stopped the Breakdown Phenomenon, but continued to distrust him as she viewed him as an "impure" existence. Since that incident, Mira would maintain her animostity towards him due to his perverted behavior. Despite her treatment, Arata would remain friendly towards her, often teasing her and causing risque situations that sometimes invoked a violent reaction from her. Nevertheless, their relationship would gradually improve when he took the second seat of Grimore Security and embarked on a mission with her to investigate Liber Academy's disappearance. When the both of them became trapped, Mira became unable to use her magic and was forced to rely on his help. Seeing his reliable and good nature, she developed a sense of respect and trust for him. When she was nearly about to killed by Illya, Arata, becoming despaired at his lack of power, transformed into Astral Trinity as a result. Astral Trinity would then order her to submit herself to him. However, Mira would reject his offer, stating she had nothing to offer to anyone who wasn't Arata, which helped re-awaken him. Since that mission, Mira's attitude towards Arata has softened, becoming more caring and willing to fight for him. Recently, it has been hinted that she may have developed feelings for him, becoming jealous when he gets close to other girls.

Akio Fudo - After transferring to Biblia Academy, Arata would first catch a glimpse of Akio and Mira returning from a mission. They would not actually meet until Arin caused Arata to create a Breakdown Phenomen which began destroying the school. Ordered by Mira to destroy him, their first encounter would involve her nearly obliterating him if not thanks to Yui's intervention. Despite their initial meeting, Akio and Arata remain friendly and get along very well due to their laidback natures. Akio does not mind Arata's perverted nature and usually plays alongs with his antics. However, she will usually become embarrased when he accidentally strips her with his magic. Nevertheless, she is willing to support and fight for him. After Lieselotte first steals his magic, Akio allowed him to copy hers, personally teaching him her magic. During their Sky Library mission, they grow closer after Akio reveals her past to him, telling him about the destruction of her hometown. This helps motivate him to defeat Abyss Trinity, the one who destroyed her village. Akio becomes grateful for his actions, thanking him for allowing her mother and hometown inhabitants to rest in peace. Akio has once stated that it was fun being with him.

Arin Kannazuki - Arin first met Arata when he discovered her taking a bath in the boys washroom. Proclaimed as Arata's partner (or wife), Arin develops in interest in him early on to see if he was worthy of becoming her partner. As a result, she had once trapped him to test him and even caused him to create a Breakdown Phenomen. Despite this, Arata does not hold her actions against her and still treats her normally. However, he initially was not sure how to act around her because of her identical resemblance to Hijiri. Nevertheless, they eventually become very close over time. Arin has since become very attached to Arata, becoming jealous whenever he interacts with other girls. She especially does not like him meeting other girls other than the Trinity Seven, stating they were alright because they were friends. They care very much for each other, willing to support and fight for one another. On one occassion, Arin broke down time and space to save Arata when he was nearly about to be killed by Hijiri. Since Arata became a Magic King, Arin has become increasing concerned about his well-being, as he could potentially re-awaken as Astral Trinity. Regardless, she decides to continue to aid him. Since meeting with Arata, others have stated that she has changed, focusing less on her studies and showing a wider range of emotions.

Yui Kurata - Arata first encountered Yui when she dragged him to her dream world to save him from being annihalated by Akio. In her dream world, he would first meet her idealized self. Thankful for her intervention, they would get along almost immediately; Yui would even start calling him big brother straightaway. Due to him creating a Breakdown Phenomenon, she would help him learn to control it by inspiring him to find his Thema and Archive. However, some time later, she would also end up creating her own Breakdown Phenomenon due to interactions with Arata which caused her magic to become unstable. Feeling responsible, Arata would help save her and finally meet her true physical appearance, quite literally as she was naked. Grateful for his help, Yui has since become very attached to him, often hugging him as much as possible and even going into his bed bare naked. She does not mind his perverted behavior and plays alongs with his antics. She can get jealous and nervous whenever he interacts with other girls. Out of the Trinity Seven, she is probably the most open to his suggestions, stating that she will be the one to due everything with him. However, despite her willingness, Arata surprisingly holds himself back; once refusing a kiss from her, stating that that was something for when they were closer. Nevertheless, they have a very close bond, willing to support and protect one another.