Toba Fumika[]
Fumika is the younger sister of Riona. Riona is harsh on Fumika, but she deeply loves and cares about her. She is aware of her hobby and often used that to her advance. Fumika also loves and admires her older and more talented sister dearly, and she was quite shocked that she was able to get a boyfriend, referring that as an end of the world or calamity,
Rokuhara Ren[]
Riona's current master and later fiance. They first met when Riona was almost stoned by Athena, and Ren attempted to save her in which he succeeded. They meet again a few days later when Riona was about to get in the mythology world, Troya. Because she needs a master to use her spiritual powers, Ren then became one and investigate a Troya world together. Riona was at first annoyed by Ren's easygoing attitude and the fact that he was an amateur without any magical aptitude or abilities, but she was surprised to how degree of physical prowess and brave he is. She starts to acknowledge him after she finds out he is, in fact, Campione and how selfless he is to save others. After they become connected via his new Authority, Riona becomes more and more aware that she develops feelings for him, which she tries to deny. She also becomes more daring to him after she finds out she can borrow his magic power to become even stronger. After Riona finds out that Ren is also in a relationship with Cassandra, she was angered on him and much to her surprise, she was jealous, still trying to deny that she loves him. However, after Riona saves him from certain death, she reveals the truth to him that she really loves him, but feared that's true. Despite their relationship grow further as Ren responds to her feelings and they've become close to each other, Riona still acts haughty and is annoyed as well as jealous when Ren still flirts with Cassandra whereas she didn't hide her feeling and desire for him, unlike Riona whose start to watch to not let them be together alone for much time.
Cassandra[]
Cassandra is a former princess and member of Troya Royal Family. Riona is in very good terms with her, holding great respect for her abilities and as a Royalty, and she always address her as a princess. However, Riona later starts to be more offensive and jealous of Cassandra because she finds her in a relationship with Ren who became her fiance, and Cassandra is above her. Despite becoming more akin love rivals, they are still good friends, although Riona stars to be prudent to not let her be with Ren alone for more time out of fear of what could happen.