Moonspear confess to me,

Caelum himself was on his own a lot, so he had not noticed his sister's absence yet either. They had not bonded very much. Mira was probably the one of his siblings that he was most attached to, if not mostly because, ironically, they both spent a lot of time on their own and seemed most alike. Mira was bloodthirstier where Caelum was cold and uncaring when it came to mutilation or death, but it worked well enough. Though he did not realise it, of all his siblings Caelum would probably miss her the most should he lose her.

Mira was already there when Caelum arrived. He moved in to lick his mother's chin, though only because that was what he had learned, not because he understood why. Then he sat down and watched his mother, waiting for a lesson to start.