This page talks about Reika's summomings and what they look like.
Name: Yami
Gender: Male
Looks:
Personality: Obedient, Loyal, Loves flying, Enjoys fish, and loves sleeping on top of clouds.
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Name: Konton
Gender: Male
Looks:
Personality: Loyal, Obedient, Sometimes lazy, sometimes clumsy, Likes sleeping, Has a tendency of staring at people for no reason, and loves to light things on fire.
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Name: Hakai
Gender: Female
Looks:
Personality: Obedient, Quiet, Loyal, Kind, Loves Water, Tends to get into fights with the other summonings (mostly Konton), Willing to help her master or any human if necessary.
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Name: Zanji
Gender: Male:
Looks:
Personality: Obedient, Loyal, Hates humans, Loves cats, Enjoys Reika's company, Likes napping, Hates being disturbed when he's in the middle of a job, Hates the rain, Loves fire.
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Any other information about the summonings: All of them were once affiliated with Reika's brother. But once he died, they all started following Reika's orders.