Aiko Hatayama/Relationships

Hajime Nagumo
At first, she thinks of Hajime as one of the students that she must cares for, and like Kaori, respected Hajime for his immense kindness. After his apparent death, Aiko was so shocked that she had fainted, feeling great remorse and responsibility for it and does whatever she can to protect her surviving students, even using herself as a bargaining chip. When they reunited in the Lake Town of Ur, Aiko was extremely relieved to know Hajime had survived, though was dismayed to learn that he has been accompanied by two beautiful women Yue and Shea who proclaimed themselves to be Hajime's lover, misunderstanding that Hajime have been too busy womanizing to return back. Aiko was shocked by Hajime's newfound cold and ruthless personality such as his refusal to aid the Heiligh Kingdom for the sake of his classmates and teacher and also threatening to kill Chase for attempting to steal his gun. Aiko was deeply saddened that Hajime had completely changed from his former self though was relieved that he had new friends that he could rely on. Hajime had always respected Aiko for her devotion towards her students as a teacher, and thus opted to confide in Aiko the true reason behind his refusal to rejoined them by telling her of what he learnt from Oscar about Ehit's true nature and how he had summoned all of them to Tortus as pawns in his mad game of death knowing that being one of her students himself Aiko will definitely believed Hajime despite being slightly skeptical and suspicious of it at first. Later, after Hajime had killed Shimizu, knowing that he had done it for her sake, she becomes conscious of him as a member of the opposite sex. Aiko is extremely worried when Ishtar and Eliheid S. B. Heiligh branded Hajime a heretic for his absolute refusal to obey them, thus Aiko desperately tried to convince them to change their mind but to no avail. Fearing that Kouki and her other students will started to attack Hajime at the instigation of the Holy Church and Heiligh Kingdom, Aiko decide to warn her students of Ehit's true nature, by asking Shizuku to gather all of them during dinner time so that she could tell them of what she learned from Hajime. but was kidnapped by Noint before she could do so. She later comes to accept that she loves him, although she's still troubled with the fact that she is older and his teacher. However, Hajime later pointed out both of her problems are meaningless as he will stop being her student after he graduates high school and their age different is pretty pointless considering how much older Yue and Tio are in comparison.

David Zahler
He is a Templar knight of the Holy Church and is in charge of Aiko's bodyguards while she roams the kingdom to use her powers to aid in improving its agriculture. At first, he and the other knights attempt to seduce her in order to make her more loyal to the Church, but they are moved by her kindness and have started being loyal and submissive to her. After learning that Aiko is partially responsible for destroying the Church's Divine Temple and killing Pope Ishtar Langbard, David and Aiko's other guards forgive her due to all they had learned from following her. He is now a devoted follower of Aiko and the new religion that is based off her new title as the "Fertility Goddess".

Taichi Furukawa
Aiko's childhood friend. The two had a brother-sister relationship, but Taichi begins to develop feelings for her and finally confesses his love for her after she returns to Earth. Aiko could not respond to his feelings since she has chosen to be with Hajime. That puts a strain on their relationship, but Aiko is convinced that they will be friends again someday.

Other Students
Having resolved to be like her former teacher, Aiko cares immensely about the safety of her students to the point that she was willing to threaten the King and the Pope after they tried to force her students to continue training after Hajime fell into the Abyss. Despite Shimizu and Hiyama's respective atrocities, Aiko had still wished they could live to make amend for their actions. Aiko's devotion to her students along with her childlike cuteness makes her extremely popular with her students, nearly on pair with Kouki, Kaori and Shizuku's popularity. When Aiko was mysteriously abducted by Noint and imprisoned in highest floor of the Holy Church in the Divine Mountain, Shizuku, Yuka and her closest friends desparately searched for her non-stop and was prepared to personally climbed the Divine Mountain to find her if they had to showing how much they reciprocate her devotion. However, not all of Aiko's students reciporate her care as Shimizu even when on verge of death had felt absolutely no remorse for trying to kill Aiko, Eri and Hiyama even exploited Aiko's abduction by Noint as a great chance to realize their nefarious plans to kill their fellow classmates in a death trap and to murder and zombify Kouki and Kaori into their respective undead sex slaves. As Hajime expected, Aiko was able to convince all of his classmates of Ehit's true nature even Kouki despite his misguided sense of justice was forced to believed Aiko's words after Eri had exposed her true twisted evil nature and her schemes of betrayal including the fact that Aiko was in reality abducted by Noint.