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A mysterious redhead who is skilled at turning invisible and flying. Loves eating anything with rice in it.
Kena appeared to Akuto one night as he tried to apologize to Junko for his actions the previous day. However, she turned invisible and escaped while Akuto wasn't looking, leaving a pair of her panties behind in his hand. Things only got worse from there. The anime has revealed that Kena apparently grew up at the same church as the young orphan Akuto, and feels a sense of familiarity around him. He often calls him "aa-chan" out of love and encourages him to be the best Maou he can, not because she's evil but because she just wants to see him succeed. Though Kena does not seem to be a very skilled fighter, her airheadedness combined with her ability to turn invisible on cue has help carried her through so far, though it's not known if she's really stupid or simply putting on an act to hide how much she really knows.
Kena often flies around with a small rice cooker and usually eats some steamed rice around Akuto, especially when before their class starts.