Ken is the stage manager for Kaleido. He is unable to perform due to a heart condition. Ken also greatly admires Sora, in many respects, and seems to be crushed out on her, but never has the guts to confess his feelings for her. In one episode, he does confess to her, but Mr. Policeman misinterprets his confession and causes Sora to believe he means it as a fan. This does not stop Ken from doing everything he can to help Sora out; frequently he acts as her personal trainer, warning her of the dangers she might encounter, and acting as the voice of reason for the group on several occasions. Anna is determined to make Ken her partner in comedy, which he is equally determined not to do.
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