In 2025 Last Cloudia x Code Geass crossover event, ”Sky Fortress Damocles,” Kallen and other Code Geass characters were pulled from their home dimension into the fantasy world of Granzelia due to magical anomalies disturbing the space-time continuum. Kallen, Lelouch, and others had to join forces with the native Last Cloudia heroes in order to stop these dimensional distortions.
Last Cloudia is a mobile RPG developed and published by the Japanese studio AIDIS; it was first released in 2019, and the game has since achieved great popularity, particularly thanks to its stunning pixel art, deep character progression, and numerous anime collaboration events. But, while the very first collaboration event between Last Cloudia and Code Geass was held in 2023, it wasn´t until the second collaboration event during 2025 that Kallen became a playable character.
The game’s story takes place in the world of Granzelia, where humans and beast-like creatures coexist. Centuries ago, humanity defeated a cruel god of destruction named Lougseus, and the world has since lived in a state of peace apparent under the rule of the Empire.
The story begins when Kyle, a young and rebellious Imperial knight, and his best friend, a talking beast named Rei, are dispatched on a routine rescue mission aboard an Imperial airship. During the mission, they encounter a mysterious girl named Theria, setting off a massive chain of events.
Kyle and Rei soon discover a conspiracy lurking in the shadows of the Empire and realize that the god of destruction who once terrorized the world is poised to return. Their journey evolves into an epic battle to save Granzelia, filled with betrayal, ancient mysteries, and new allies.
Last Cloudia beautifully blends highly detailed, hand-drawn 2D pixel-art characters with dynamic 3D backgrounds, and also combines a classic RPG atmosphere with modern, fast-paced real-time combat. In the game, you control a team of three characters (plus a friend's character) in real time. You can move freely, chain basic attacks, use special abilities (Skills), and unleash spectacular character-specific finishing moves (Specials). Additionally, ”ark” system is a unique game feature, where "arks" are a type of equipable magical memory. Due to them, any character to learn almost any skill or spell in the game, which allows an exceptional level of freedom in character customization.
In the game, Kallen is built as a highly mobile, True Dual Wield, Fire Physical DPS (damage per second) character. Unlike ranged units from the collab (like Lelouch), Kallen is notably fast and focuses on aggressive close-quarters combat, true to her character as seen in the anime. Her toolkit mirrors her pilot reflexes, featuring "Super Armor" effects that allow her to attack continuously without being interupted by enemy hits, and she comes out of the box with highly efficient passive skills, such as Fire Package, that grants a +30% physical damage increase against any enemy weak to Fire.
There were many easter eggs and additions made for Code Geass fans during the event. For example, if you place Kallen on the same team as Lelouch, they exchange special voice lines during battle. And when the battle ends in Kallen's victory, her victory animation pays direct homage to the anime: she climbs out of Guren's cockpit, wipes the sweat from her brow, and gazes determinedly into the distance - just like the series' iconic cuts featuring mecha pilots.
As mentioned before, Last Cloudia is known for its incredibly detailed 2D artwork. In this official art created for the Last Cloudia x Code Geass crossover event featuring Kallen, she is depicted in a dynamic, aggressive combat stance, wearing her iconic pilot suit. Looming behind her is her signature mecha, the Guren S.E.I.T.E.N. Eight Elements, with its energy wings glowing a brilliant red. When utilizing the Live2D effect and moving the image on the phone screen, the Guren’s glowing effects and the movement of Kallen’s hair come to life.
Unfortunately, since ”Sky Fortress Damocles” crossover was LR (Limited Rare) event, if you didn´t aquire Kallen during that event, you cannot currently pull her from the game's standard character banners. As she is a limited-time collaboration unit, she can only be obtained while the Code Geass event is active – meaning, it is possible to obtain her again only if AIDIS decides to hold another Code Geass event in the future. So, if you just started to play the game, keep your eyes open for her! 😉
Link to the original picture is here, and if you´re interested, here is Kallen´s introduction trailer for the event.