Altana Magnus/Relationships

Royal Biblia Academy
Arata Kasuga - For unknown reason she finds him interesting, and very curious about him being the Great Demon King, upon observing him she laughs insanely. She also thinks if he has what it takes to beat her. Upon turning into a child by mistake after being reincarnated, he is guided by Altana whom she finally makes contact with him. Altana helps him and even introduces him to teachers that will give him power to defeat the goddess. Despite being an Arbitrator she very much loves to tease Arata and even doesn't mind his perverted attitude but instead goes along with him.

Demon Lord Knights
Pandora - Both of them have complicated history, in the past Pandora was shocked when she found that Altana was actually an Arbitrator. She is the one who gave Pandora a forbidden Mythical Armament weapon (not knowing how dangerous it is) for her revenge against Ana. In the current timeline she isn't hostile towards Altana, in fact she seems to care about her, they share mutual understanding, however sometimes she dislikes her constant laughter about everything.

Patricia Caesar - Although they barely interact, however in the past, she did something horrible to them. Altana simply wanted to complete her experiments she did on Pandora and Ana forcing a deadly bloody fight. She doesn't trust her even if she shows a gentle face, when they were all trapped. Though surprisingly Altana bowed and apologized to what everything she's done. In the current storyline she shows no hostility towards each other and rather friendly.

Yumegaya Chris - Similar to Patricia had to go through harsh battle between Pandora then Ana just for Altana experiments to succeed. Currently in the present both of them bear no grudge against each other. She later bows and apologize to everyone. In the current storyline they are in good terms, seemingly the past actions never existed, in her memories.

Suiten Inori - Inori along with the rest of the Demon Lord Knight had a horrible past with her, as she was hostile to them forcing them to fight Pandora and Ana who were her former comrades, just for results for her experiments. Altana later bows and apologize for her actions towards her and everyone and would help them return the closed space to normal. However currently she bears no ill-grudge against her and they support each other,

Mamiya Yorun - Just like the other Demon Lord Knights, Yorun despised Altana for what she did to them and her comrades for her experiments, such as fighting Pandora and Ana who were their friends. Altana bows and apologize to her and everyone present, and that it is her fault. She will also help her, and the rest to return to their original world. In the current story line they don't interact so much but are on good terms. In the past, when she saw her appearance she thought she resembled an angel.

Trinity Seven
Anastasia-L - Having turned Ana into a Demon King for her experiment she is pleased with the results, when Demon King Ana confronts Altana, she informs her how Arbitrators like her coexist with human beings, especially those who are Demon King. Mentioning that it is scary. When Altana says that she wonders how far the demon experiment can do, Ana immediately attacks her, but she disappears. Ana says that an Arbitrator like her won't let her do as she please. She found Ana fighting with her former friends is wonderful, while observing from a far distance. After Ana demonization is reverted when the Mythical Armaments sword shattered, she appears before her. Informing the group of their situation due to their fight, they are locked in a global space-time. She later bows and apologizes to everyone including Ana, and that it is her fault that everyone is locked inside a space-time. She later helps Ana and Lilith escape the closed world, to return to the original world.

Lilith Asami - Altana somehow knows that Lilith is the daughter of Arles Azazel, through unknown reason. mentioning that she will make the same mistake. She is interested in Lilith and knows that she destroyed the world once before, via unknown means. She later helps Lilith escapes with Ana and the rest of them. Altana doesn't seem hostile towards Lilith. Altana also knows what awaits Lilith future and it would be The Last Key. She seemingly had made a promise and mentioned that she would defiantly fulfill it.

Other
Arles Azazel - Altana has mentioned that Arles is her best friend, although Arles never mentioned such claims. She was given an unknown promise from Arles that is referred to Lilith it was probably to not harm her. Altana indeed never harmed Lilith. Altana also mentioned on two occasions that Arles is her best friend, she stated when talking about Lilith "my ally friend" and when introducing the Demon Lord Knight, she mentioned that Arles Azazel is her best friend.