Eterna could hear the girls heart beat and it had shown signs of excitement or arousal and not that of fear. Was that what this fascination with the term 'pet' about? She would have to explore that possibility later on when she had the chance.
"We're going to get a collar fitted for you. You can take this one off far too easily as you've already proved" Eterna said pointedly, she wasn't a big fan of buckled collars anyway and much preferred the elegance and sturdiness of a metal one.