Gremory is a research scientist from the devildom. Her life is solely dedicated to researching magic.
Her mind largely deviates from that of an ordinary person. She often gets trapped in her own thoughts in any time and place. She would start talking to oneself in middle of conversations or burst into endless ravings about her crazy research ideas.
To Gremory's eyes, everyone is an experimental subject. No once can predict what will happen to a subject in her lab or whether the subject will be able to see the sun again for that matter.