Ichika is a human girl who abruptly joins a beach outing with Kio, Eris, and others. She exhibits a cheerful and mischievous nature by instantly sampling the students' grilled food without hesitation. Her expertise lies in technology and engineering, specifically in crafting "Zaubersiegel"—magical seals operating through advanced scientific principles that appear mystical even to the technologically adept Catian aliens.

During an assault by Dog AssistDroids, her skill with these seals becomes vital as she deploys them defensively to shield the group. An avid inventor, Ichika dedicates her free time to designing and building diverse gadgets in her basement workshop, frequently innovating new iterations of her signature seals. She is also a devoted enthusiast of the classic sci-fi series *Captain Future*, expressing astonishment that modern youth lack familiarity with it.