In My-Otome Akane Soir is the leader of the Trias, the top students at Garderobe, and hails from Cardair. Erstin Ho and Irina Woods are her room attendants and she is in a relationship with Kazuya Krau-xeku, one of the princes of Cardair. She is cautious about going too far physically with him, and becomes conflicted between her dream of becoming a Meister and her love for him. When the King of Florence, Charles Guinel Roy d'Florince VIII, comes seeking a new Otome Akane is assigned, and nearly becomes his Otome before Kazuya arrives at the ceremony and elopes with her.
It is later shown that Kazuya was taken by Cardair guards right before he and Akane could consummate their relationship, and that Akane was arrested by the 5th Column Mahya Blythe in episode 24 and forcefully contracted to Kazuya, the new king of Cardair, with Mahya declaring that she will not let the couple do anything "H" (essentially meaning not allowing them to have sex).
Akane returns in Mai-Otome Zwei as one of the Otome involved in Operation Meteor Breaker in a non-speaking role, and features in Episode 3 with several other Otome in a bathhouse in Artai while the SOLT is taking place. King Kazuya (wearing a chastity belt) is with her where it revealed that they haven't given up on their relationship, despite Mahya's repeated foiling of their plans to have sex.