|Full Name||Saegusa Mayumi|
|School|| First High School |
|Weapons & Equipments|
|Voiced By||Kana Hanazawa (Anime)|
|Novel||Volume 1, Chapter 1|
|Manga||Volume 1, Chapter 1|
|Anime||Episode 1, Enrollment Chapter I|
|Spin-off Manga||Volume 1, Chapter 2|
Mayumi shows respect towards Miyuki and appears to be glad of the fact that Miyuki shows no interest in distinguishing the difference between "Blooms" and "Weeds". However, Mayumi also playfully teases her in regards to her (Mayumi) relationship to Tatsuya. She also takes advantage of Miyuki's words and desires to get Tatsuya involved in events such as the Nine Schools Competition.
A kōhai she met on the first day of school, and later becomes a friend. To Mayumi, Tatsuya is a unique individual with equally unique skills and knowledge of Magic that she finds captivating and worthy enough of her attention.
Throughout the novel, it is implied that Mayumi has strong feelings for him. This is shown by the fact that Mayumi is comfortable enough to drop her guard around Tatsuya, and that she displays jealousy whenever Tatsuya praises others, such as Suzune. Interestingly enough, Mayumi is prone to becoming flustered whenever he directs his praises at her - something which she should be accustomed to by now due to her upbringing.
Mayumi has also noticed Tatsuya's powers in display. During the Monolith Code Competition, she noticed Tatsuya recovering from a fatal attack to defeat Ichijou Masaki, which made her panic. During Yokohama Incident, using Multi-Scope, she saw Tatsuya use "Mist Dispersal" to destroy a large truck, which left her stunned.
She was struck speechless when she learned that Tatsuya was a Special Lieutenant in the 101 Independent Magic-Equipped Battalion and saw how he cured Kirihara and Kei from their wounds. When Miyuki explained this unique ability of his, Mayumi, along with several others, promised not to tell anyone about Tatsuya, displaying her loyalty and appreciation for him.
In addition, during the events of Volume 13, Tatsuya and Mayumi met in a Fashion Center, where by chance Tatsuya happened to see Mayumi in her swimsuit. Mayumi appeared to be calmed at first, but she screamed after receding back to the changing room. After the incident, Mayumi and her twin sisters joined the Shiba siblings at at a cafe, where she apologized to Tatsuya for making a fuss. She was shown to be quite disturbed when Kasumi said that the Shiba siblings were on a date. She futilely objects to Tatsuya paying for the entire cafe bill.
After the death of Nakura, she is worried about asking Tatsuya for help, instead of Juumonji Katsuto. Due to Mayumi's strange focus on Tatsuya's circumstances, Mari voices her suspicion that Mayumi is in love with Tatsuya. Mayumi weakly and unconvincingly objects the facts. It may be hinted that she likes Tatsuya due to losing her confidence in her speech.
During events of Volume 15, in a hotel at Kyoto, Mayumi invited Tatsuya to have a meal together. After dinner, they went to the bar and Mayumi told Tatsuya to join her dating game by calling her Mayumi instead of senpai, however Tatsuya outplayed her by pretending to be her bodyguard and he addressed her as Mayumi ojou-sama. After Mayumi got drunk, they leave the bar and Tatsuya delivered her safely to her room. In the front of her room, Mayumi tried to put the key in her chest but Tatsuya snatched it immediately.
In her room, Mayumi asked Tatsuya to help her undress which gave Tatsuya headache. Tatsuya stripped her quickly, and before anything else could have happen shoved her into the bed leaving her in her underwear. He went out of the room without a second glance back at her. In the afternoon, Mayumi asked Tatsuya why she wore only underwear in the bed, Tatsuya lied to her by saying that she stripped herself when she got drunk, Mayumi then dropped the bomb, she said she remembered everything, that Tatsuya should not have shoved her too roughly and her cheeks became red when met him. At the National Magic High School Thesis Competition, Mayumi told Tatsuya that she will forget what happened that night in front of Tatsuya and Miyuki, makes Miyuki jealous and she interrogated Tatsuya about what happened between him and Mayumi.
In Volume 17, Kouichi explained to his daughters that Tatsuya and Miyuki are from the Yotsuba Clan, he noticed the strangely shocked behavior of Mayumi after she learned about it. Kouichi also told them that Tatsuya and Miyuki are engaged and then he proceeded to ask Mayumi what she thought of Tatsuya as someone of the opposite sex. Mayumi blushed when she answered the question. Mayumi basically declined by saying it's inappropriate for the women's side to make the proposal, especially when Mayumi's the older one. Kouichi went on to say that there will be no problem if Mayumi decides to become part of the Yotsuba if the Yotsuba are willing. Especially since there's only small age difference between her and Tatsuya. After hearing this Kasumi and Izumi strongly protested against his idea.
At the dining room of the University, Mayumi had a talk with Mari. In their conversation, Mari pointed out to Mayumi that she may have romantic feelings for Tatsuya. Mayumi only partly accepted Mari's words, but she admitted that there is nothing she can do, as she does not yet understand her feelings and it's inappropriate to make a move on an engaged man. Mari suggested Mayumi to object her father's plan. Mayumi said she already did, but her father stubbornly encouraged her to marry to Tatsuya. Mari told Mayumi maybe the sly old fox had seen through her facade as Mayumi's still not wholeheartedly disagrees with the plan, then she advised Mayumi to thinking carefully and make the decision before it too late.
As her elder sister, Mayumi cares deeply for Izumi and is shown to be embarrassed by her excited actions at times.
As her elder sister, Mayumi cares deeply for Kasumi, similar how she cares for Izumi. Mayumi is however shocked by Kasumi's overprotective nature when it comes to her (Mayumi).
Although she disapproves of Hattori's discrimination between Course 1 and Course 2 students, Mayumi appears to respect Hattori as a fellow member of the Student Council. However, Hattori appears to be the victim whenever Mayumi has her little "fits".
Saegusa Mayumi's relationship with Juumonji Katsuto is strictly business oriented. An example of this business like relationship is when Katsuto discusses with Shiba Tatsuya on Volume 4, Chapter 14 of the light novel.
|“|| In regards to being President Saegusa's partner, was Chairman Juumonji's name not considered as well?"
That was certainly brought up too.
Is President Saegusa not your type?
No? Well Saegusa does have, cute charms, in her own way.
While the two do not share intimate or sexual affection,the Juumonji and Saegusa families have rather close internal ties together. Mayumi appears to show affection with Shiba Tatsuya in multiple occasions, and to her, the business that goes on with Katsuto will at most stay strictly platonic.
Suzune, nicknamed "Rin-chan" by Mayumi, was invited by Mayumi to the Student Council and is grateful for her presence.
Mayumi likes to give Azusa the nickname "A-chan" and has entrusted her with the role as the next Student Council President after she resigned.
During the Nine Schools Competition Arc, she gave Azusa help in her paper about explaining the problem with Flying-type magic, and explained to her the origin of the idea of "Bloom" and "Weed" at First High.
Mayumi and Mari are close friends, and are two of the "Big Three" during their time at First High. The two share the same view that "Blooms" and "Weeds" shouldn't be antagonistic towards each other, and usually work together when trying to persuade people into taking certain actions. Tatsuya is usually the target. Between the two, Mayumi is the more playful one while Mari is the more serious one.
Due to their close friendship, Mayumi treats Mari as a confidant. After Nakura Saburou's death, it is Mari that Mayumi first voices her concerns to, and it is Mari that suggests that she should turn to someone outside of the Saegusa Family.