Klaudia first appears when Estelle confronts Clem over stealing her Bracer badge. Not aware of the circumstances, Klaudia orders Sieg to attack Estelle. However, Joshua quickly soothes the situation and she apologizes. Klaudia then introduces herself as 'Kloe Rinz' and treats Estelle and Joshua to some of her Apple Pie as her own way of apologizing. After leaving the orphanage, Kloe escorts Estelle and Joshua to Ruan and shows them around the city, running into the Raven Gang.
Kloe reappears again at Mercia Orphanage after it gets burned down in an arson attack. She joins Estlle and Joshua in investigating the cause, before Agate Crosner takes over the operation. Kloe suggests that the pair of bracers instead help with the Jenis School performance, the Madrigal of the White Magnolia. After the play is over, Kloe shows her delight when the Dean gives Theresa the money that the school had gathered up in order to rebuild the Orphanage. However, Kloe becomes shocked when she hears that Carna and Theresa were attacked and the money stolen. After checking on Theresa and the kids again, Kloe goes with Agate, Estelle and Joshua to the lighthouse where she confronts the hypnotized Ravens and one of the culprits- Gilbert who reveals that Mayor Dalmore was the one who planned everything.
Along the way to Confront the mayor, Kloe leaves the group for a bit to send a message to the Royal Guardsmen. When Kloe questions the mayor, Nial Burns (who followed them) reveals that Dalmore is massively in debt. Kloe then asks the mayor why he didn't sell his estate which could've paid off his debts, and he responds that he couldn't give up his lifestyle because of his family history. Dalmore then sets his monstrous pets on the group, but they are successfully defeated. Seeing this as a opportunity, Kloe and the group follow Dalmore, as he escapes through a secret passage and tries to escape out to sea in his private yacht. Though they become relieved to see the Arseille and Julia Schwartz who arrests Dalmore. At the Bracer Guld, Kloe is then delighted to see Estelle and Joshua get their 3rd recommendation before she heads back to school.
The next day, Kloe escorts Estelle and Joshua to Air-Letten, and makes plans to see them at Grancel for the Queen's Birthday Celebration. Seeing the pair leave Kloe then meets up with Julia and starts making arrangements for her trip.
Kloe is seen again separate from Julia and trying to escape from Alan Richard's troops. However, she gets captured by Alan Richard and Captain Lorence. She is then held in the Erbe Royal Villa with all of the Intelligence Divisions other hostages while Richard and his assistants try to find a suitor for her.
Klaudia / Kloe is later rescued when Estelle, Joshua and the rest of the Royal Guardsmen led by Julia Schwarz attack the Villa to get her back. In the process though, she reveals her identity to them as the princess of Liberl, after she tries to barter for a little girl's release. After reconnecting with everyone and meeting Scherazard Harvey and Olivier Lenheim and all of the other Bracers, Klaudia then asks Estelle and Joshua to help her rescue her grandmother and take back Grancel Castle. Estelle and Joshua agree to help her, and she goes off with Estelle and Scherazard to the palace by airship at noon the next day when the attack commences.
Landing on the roof, Klaudia helps Estelle take out Kanone Amalthea and Duke Dunan. When Klaudia confronts her uncle though, she allows him to live after he knocks himself out and allows Phillip his butler to take the unconscious Duke into her quarters for the time being. She then helps Estelle and Schera retrieve her grandmother from Captain Lorence. After reuniting with her grandmother, she goes with everyone to the room where the elevator to the ruins below are.
At the Queen's Birthday Ceremony, Klaudia attends the Queen's speech in her full princess outfit and then sneaks out to meet her school friends later. Later that night, Klaudia bakes some sweets and can be seen in her grandmother's chamber having tea with Hilda, Julia Schwarz and her grandmother, Queen Alicia.
Kloe returns to assist Estelle in her operations around Liberl, joining her once again in Ruan. Their first objective is investigate the series of ghost sightings which they narrow down as coming from the Old School House near Jenis Academy. Traversing through the dungeon beneath it, they confront Bleublanc, enforcer number X of Ouroboros who explains he is the one behind it and is enamoured by Klaudia's pride, desiring to steal her. They become trapped by te Phantom Thief's shadow stitching knives but are rescued when Dorothy Hyatt's camera frees them. After defeating the Stormcaller archaism set upon the by Bleublanc, he retreats and the ghost matter is resolved.
Klaudia joins Estelle in her travels around the remaining regions, including Zeiss where they stop Earthquakes, Grancel, where they stop a Coup attempt as part of Renne's mad tea party, Rolent where they solve a problem with mist putting people into a coma, and Bose where they stop the ancient dragon Ragnard with the help of the Liberl military. Kloe would eventually face blueblanc again at the top of the Esmelas tower, but fails to stop him along with the de-activation of the tower.
During the widespread orbal shutdown, Klaudia is taken hostage by the enforcers when they storm Grancel and the castle, taking both her and the queen. They are rescued by Maximillian Cid and Alan Richard. Kloe is then instrumental in organising a political solution when several Erebonian Steam tanks arrive in the North, suggesting they can stop the disturbance thanks to the Arseille, which has been equipped with zero-field generators allowing it to operate.
They travel to the Liber Ark where Klaudia helps stop Ouroboros' plans and restores peace to the country.
Princess Klaudia is one of the individuals who attends the West Zemuria Trade Conference being held in Crossbell along with Julia Schwarz and Sieg. Before they arrive there in the Arseille, they receive a message from Alan Richard. When they arrive in Crossbell, many people come to see Klaudia and Julia.
Later that evening, Klaudia has Sieg deliver a message to the Crossbell Police Special Support Section due to their friendship with Estelle and Joshua Bright in order to meet them on the Arseille. After getting to know them, Klaudia informs them about the activities of the Anti-Immigration League's activities in Calvard while prince Olivert informs them of the actions of the Imperial Liberation Front in Erebonia.
During the day of the conference, princess Klaudia is among the leaders present and meets with Lechter Arundel again while telling him they should have a reunion with the rest of their classmates from Jenis at some point. Klaudia is also present when the Imperial Liberation Front and Anti-Immigration League attack the conference with her staying in the conference room for her safety. After the attack, she is present when mayor Dieter Crois declares the independence of Crossbell and returns to Liberl with Sieg and Julia.
Klaudia was sent in place of Queen Alicia as the Liberlian representative, accompanied by Julia, Cassius and Lucy. She was distraught to hear of Olivert's death due to the time she spent with him during the Liberl incident. During the attack on the Pantagruel by Ouroboros, Klaudia encountered Lechter and supported Lucy's decision that they should have a reunion sometime later, stating that both Hans and Jill missed him. She was also relieved to see that Olivert was still alive after he revealed himself during the attack. Following the withdrawal of Ouroboros forces, Klaudia returned to Liberl.
Once Rean Schwarzer defeats everyone that played Pom! Pom! Party! before the beginning of the Great War, Klaudia reveals herself during a phone call to him and revealed that she was one of the people that helped back the game and congratulated him for his victory. Right before the war began, Klaudia was among the people that received footage regarding the war from Jona Sacred and prepared to watch it.
Following the end of the Great War, Klaudia attended the wedding of Olivert and Scherazard.
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