Rinna Kazamatsuri

Rinna Kazamatsuri is a member of Akatsuki.

Appearance
Rinna is a petite girl with pink hair dressed in a pink dress. She has an eye-patch patched to her right eye.

Personality
Rinna seems to be very arrogant of her own powers as she seems to talk down to Renren and continues to call Renren human believing herself to be above human level. However, it seems she also is very courteous to other people whose strength she respects, as shown with Ikki when she offered him a job to be her servant based on what she had seen.

History
In her childhood, Rinna found Charlotte Cordé alone on the streets, and decided to make Charlotte her maid. Charlotte became extremely loyal to Rinna, wanting to repay her kindness in any way. Rinna also adopted a lion named Sphinx.

At some point Rinna had joined Akatsuki Academy.

Akatsuki Strikes
Rinna is seen riding her lion, Sphinx, going to Hagun Academy, along with the other members of Akatsuki, with the intentions of destroying it.

After they had done so, the Hagun Academy's participants in the Seven Stars Sword Art Festival, had arrived and the two had nearly clashed, however, Akatsuki was betrayed by Nagi, and were cut down. However, it is revealed that they had seen Nagi's betrayal coming and had prepared clones of themselves in their place in order to take Nagi by surprise.

After Ikki, Shizuku, Stella and the Hagure sisters had left Rinna faced off against Renren. She was able to easily outmatch her in all categories (speed, power, etc.) and defeat her with not much trouble as the other student council members were defeated as well.

The Akatsuki members had decided to go after Stella and the Hagure sisters and were able to catch up to them, however were stopped by Nene who was able to easily overpower them, except Ouma. Rinna and the other Akatsuki members had decided to retreat had they had done what they came to do.

Party Crashers
Rinna is seen at the party with her maid, Charlotte Cordé, confronting Ikki and Shizuku. She offers Ikki a job as her servant, revealing that she is very well off. Although Ikki initially refuses the job offer he does accept her business card. She then leaves with her maid.

One vs Four
In the preliminary round of the Seven Stars Sword Art Festival, Rinna accepts Stella's challenge to fight against her, alongside Hiraga, Yui, and Mikoto. Sphinx is scared off by Stella, after seeing Stella's dragon like aura. Rinna is protected from Stella by her maid, Charlotte. Charlotte is shown to be Rinna's ace, as she is able to fight against Stella equally, using an ability granted by Rinna, Ichirin Junka. Rinna and Charlotte are still beaten by Stella's overwhelming force, as they are defeated by Stella's Noble Art, Katharterio Salamandra. Rinna decides to drop out of the tournament, after her match with Stella.

The Festival is Over
Rinna participates in the party after the Festival. She is seen talking with Kanata. Kanata questions why Rinna joined Rebellion, and Charlotte tells Kanata that Rinna joined, because Rinna's father, Kouzou Kazamatsuri and Bakuga Tsukikage are old friends, and Rinna has been acquainted with Tsukikage since her childhood. Kanata tells Rinna she shouldn't do such criminal activities, and even threatens to censor a manga Rinna likes. Rinna quickly agrees to this.

Night of Massacre
Later, after the Seven Stars Sword Art Festival Rinna, Sara and Charlotte bring Bakuga to the destroyed headquarters of Rebellion to meet Kouzou Kazamatsuri.

Abilities
Subordination: Rinna is able to subordinate animals or people with her Device.

Device
Collar of Subordination: Rinna's device is revealed to take the shape of an animal collar. It can also be used on humans and can transform normal humans into Blazers.
 * Power Granting: Rinna's Noble Art that allows her to grant animals and people the powers of a Blazer.
 * Sphinx: A giant lion that Rinna rides in combat. She grants it blazer abilities with her own ability.
 * King's Pressure (獣王の威圧, lit. Beast King's Coercion): Sphinx roars at the opponent completely immobilizing them.
 * King's Charge: Sphinx charges towards the enemy and hits them with great force.
 * Charlotte Cordé: Rinna's maid and ace, that she grants blazer abilities with her own ability.
 * Ichirin Junka (一輪楯花): Charlotte's ability that creates extremely durable barriers. These barriers can also be used to form blades and shurikens for combat.

Trivia

 * Rinna has a case of chuunibyou (中二病 roughly Middle School 2nd Year Syndrome)