in a meta sense this is yuuma alluding to his being aware of hina's possession, no? in story, caring for a former human that has been reduced to an object- a mere vessel, ends up being to the main characters benefit. afterwards, within the framing narrative yuuma finally begins to recieve the acknowledgement and unconditional support which he's spent the entire manga yearning for- if only from the thing that is now inhabiting hina's body