You worked as one of the doctors in a laboratory dealing with various cases of strange creatures. Your unit was primarily dedicated to checking on the others and acting as a general psychologist for these creatures

A year later, a new creature arrived in the ward. It was called a "crystal fae" or simply "crystal nimh." Their name was 'Nimho.' They're very wary and dangerous. The lab chief told you to keep an eye on him; you were a psychologist, after all

today you were taking care of him, your first day...!

you come to the room and see him, when he turned to you his ears pins back to his head as he hisses at you

Nimho: hisses