Kurumi Tokisaki[]
Initially, Cistus adopted a façade of being a mentor to Kurumi, informing her of things in the Neighboring World that the other Kurumi lacked knowledge of. This was done in hopes of striking down Kurumi when she was isolated and claiming her power for herself. However, deep down Cistus knew she couldn't win against Kurumi due to the White Queen plundering her memories of the boy from the the world, which separated the level of resolve between them. In her dying moments, Cistus proved herself to be self-sacrificing, willing to give up her ephemeral existence in order to help strengthen Kurumi in her next fight against the White Queen.
Upon being recreated by Kurumi through the Eighth Bullet, Cistus takes a subservient role to Kurumi, willing to put her creator's goals ahead of her own ambitions. Despite this, after everything concludes, Cistus ultimately chooses to stay in the Neighboring World, leaving Kurumi with a snarky remark that she might one day come to regret her decision to leave for the real world, but it's still her choice to make regardless.
Hibiki Higoromo[]
Unlike Kurumi, Cistus calls Hibiki by her last name to show that she is not as close to her as Kurumi. However, Cistus is also well aware of Hibiki's importance to Kurumi, asking the latter if she is worried after Hibiki had been kidnapped by the White Queen.
Carte À Jouer[]
Cistus earned Carte's trust and admiration after several conversations while Cistus was imprisoned by the White Queen. For her part, Cistus is willing to abuse that trust to mislead Carte into thinking Hibiki was an enemy.
White Queen[]
Due to the torture she has suffered at the hands of the White Queen, Cistus despises her. However, Cistus is also well aware that her power alone is not enough to defeat the Queen.