Their account names are always left empty, so they're only known as "Blank"
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Jibril's Kitchen was a facility intended for the purpose of feeding her masters Sora and Shiro. She is able to bend reality by using Avant Heim as a manufactured wormhole using Phantasma magic. It is bound together by using magical rites as seen from the symbols in the pink. It has full capabilities to conjure up nearly any material that can be consumed or utilized. Stephanie Dola used this location to create food in order to fuel Sora and Shiro as they searched for the answer to defeat the Eastern Union.