Lelouch of the Rebellionas well as one of the two protagonists of Code Geass: Kallen was awarded 8th place in the 29th Anime Grand Prix, then 17th and 16th, respectively, in the following two. Kallen is a young woman who has a slim yet strong build, and fair skin.
Her most distinguishing features are her big blue eyes and her red hair, which she had combed down at school but spiked up when fighting or in her own privacy. She has an average height, being slightly taller than C.
When she is fighting in her original Knightmarean outdated GlasgowKallen wore a vest-shorts combination. Once she begins to pilot the Guren Mark IIshe wears a magenta suit that zips up to her neck.
Other times, Kallen is seen wearing a standard Black Knights uniform. In school, Kallen wears a ladies' school uniform. While at important reunions or during her brief time as a prisoner, she wore a yellow, fashionable dress to an elegant blue dress.