Aika is a Government-affiliated Summoner—one of the three major factions in the series. She's best known for being a shut-in who's deeply obsessed with Kyousuke Shiroyama, calling him "Onii-chan" despite no actual family connection. Her combat strategy revolves around her white liger, which she uses as a yorishiro to channel her summoning powers. Fans often note that her devotion to Kyousuke is a defining quirk of her character.
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