Claire Kagenou/Relationships

Cid Kagenō / Shadow
Claire had shown to be stern and strict to her younger brother Cid, who she constantly trained and scolded whenever he was slacking off. Although she's strict, Claire deeply loves him and is genuinely trying everything she can to toughen him up to secure a better future for him. When she was little, Claire was excited at his birth and they had gotten into her fair share of troubles due to her reckless behavior, only to be saved by her brother. She loves him for this, hence she gets upset when people think so little of Cid and that the two are miss-matched siblings. Another factor for her over-attachment to Cid was her learning that she had Demonic Possession, causing her to believe that she had little time left and chose to spend as much as she can with him, completely unaware Cid had already cured her when she hugged him. Rumour spread and eventually, the Cult learned of this, and Claire was violently protective of Cid when Viscount Grease voiced wanting to bring him in.

She has shown to be overly protective of her brother, such as if someone shows the intention to harm him, she will unleash her rage on them. Not even Princess Iris was exempted from her wrath when she had her brother detained. Claire's protectiveness of Cid also extends to putting herself in harm's way to save him, such as when she ventures to the Crimson Tower to save him, only to find some stranger mistaken for Cid. Consequently, due to her protective nature over Cid, she has started to notice faint similarities in his Shadow stands and the side of his face, but Claire has not made the connection due to her notices being during duress and fleeting instances. Additionally, Cid has been shown to be protective of his sister and will come to her rescue whether it's in secret or as Shadow.

Mr. Kagenō
Claire's father, whom she has no respect for, due to his cowardice and how he constantly tries to get out of his responsibilities as family head. Claire doesn't hold any qualms about insulting her father by calling him "Baldy", which many people always call him due to his cowardice.

Mrs. Kagenō
Claire's mother and their exact relationship is unknown, though she seems to at least respect her more than her father.

Zeta
When Claire began displaying symptoms of becoming Diabolos' host, Zeta sent Nina to infiltrate the Academy to watch her. Upon confirming her suspicions, Zeta forcefully had Claire absorb Diablos' severed arm, intending to use her to harvest Tears of Diablos to make Cid immortal.

Rose Oriana / 666
The two show no interactions with each other while at the Midgar Royal Spellsword Academy in the novel and manga. However, in the anime, when Cid is being interrogated about Alexia's kidnapping, Claire tries to confront Iris to clear Cid's name but Rose stops her by physically subduing her. After Rose joined Shadow Garden under the guise of No. 666, the two would meet up inside the Crimson Tower of the Lawless City, though Claire did not seem to recognize Rose under her guise as No. 666. In the game during the "My Rival" story, both of them would get into arguments when it come to Cid. Rose also notes that Claire deeply cares for her brother, and is jealous of her.

Nina
Claire and Nina became good friends after the latter joined the Academy though with very contrasting performances. Claire is unaware of her true allegiance to Zeta.

Alexia Midgar
As princess and underclassman, Alexia is held in respect by Claire. This was until Cid enrolled into the academy and started a "relationship" with the princess.

Claire despised Alexia for "breaking" her brother's heart and did not interact with her until the two were investigating matters regarding Diablos. During their first interaction, the two made an uneasy alliance to further investigate the cult and student disappearances. To some extent, Alexia cares for Claire since she's Cid's sister. Alexia also notes that Cid and Claire have the same traits in terms of their attitude. The two are unaware of Shadow's true identity and are beginning to pick up hints about it.

Iris Midgar
Despite being the Princess, Claire was willing to hurt Iris to save her brother. After Alexia's return and the terror attack on the academy being quelled, Claire and Iris bonded over their shared worries as elder sisters and their younger siblings causing them hassle.

Mary
Mary and Claire met during the Red Moon Incident with a shared goal. With Mary's vampire hunting knowledge, Claire joined her to save Cid, but the two instead found a fallen dark knight boy who partly resembled Cid. When Aurora took possession of her body and worked with Shadow Garden, they escaped alive and Claire reunited with her brother, bidding farewell to Mary as she took Elizabeth somewhere safe away from people to restart their lives.

Aurora
Aurora first appeared before Claire in her mind during the battle against Elisabeth, which she was capable of because she is her descendant. The witch proceeded to take over her body to protect her and managed to hold the Blood Queen off long enough for the Shadow to arrive and save her. Afterwards, a weird mark appeared on Claire's hand, signifying that she had become Aurora's host.

Since then, Aurora has become Claire's companion and is always advising Claire to avoid seeking trouble which has fallen on deaf ears and the witch continues appearing in her mind, regularly disrupting her daily life. Claire has questioned Aurora multiple times regarding who she is and what is happening to her but the witch refuses to elaborate, believing that "that person" is trying to protect Claire. After escaping from Jean, Claire blamed Aurora for "ruining" her dignity as a big sister when she crashed into Cid's classroom during the exams.