Each day upon awaking, Auri activates Foxen by putting an unknown chemical into his dish, causing him to emit a bright blue-green light.
She carries Foxen in her hand, but puts him a glass bottle with a rubber gasket to seal the lid when she dives underwater, sometimes she ties him into her long hair when she needs to free her hands.
It´s unclear if Foxen is a living being, an anthropomorphized inanimate object. Some of the possibilities include:
- A mysterious and unknown animal with biolumenscent capabilities.
- A colony of microscopic beings (such as bacteria or fungi) capable of bioluminescence while "feeding" on the chemical Auri drips into it.
- An alchemical object, such as a rock or metal that emits light in the presence of a reactor.
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