Im starting to think the heart stone is really Yanzi's heart. Sute probably managed to take Past Mimi's heart but because Yanzi isnt from that Era, He had to go back to the real world through death. By transplanting his heart to Past Mimi, Past Mimi got to survive and later become stone guarding Yanzi's grave. Thats why, Stone got activated by Yanzi's blood and why Stone acts so familiarly with him.
I feel some magic happened that Past!Mimi used inorder to become Stone and live to modern times(hibernate) and later on live as long as he was loved by Yanzi, I MEAN THEY MANAGED TO TURN BACK TIME. I bet its also rewinding time that happened cuz Past mimi couldnt accept Yanzi's death (heart transplant)...
Im starting to think the heart stone is really Yanzi's heart. Sute probably managed to take Past Mimi's heart but because Yanzi isnt from that Era, He had to go back to the real world through death. By transplanting his heart to Past Mimi, Past Mimi got to survive and later become stone guarding Yanzi's grave. Thats why, Stone got activated by Yanzi's blood and why Stone acts so familiarly with him.
I feel some magic happened that Past!Mimi used inorder to become Stone and live to modern times(hibernate) and later on live as long as he was loved by Yanzi, I MEAN THEY MANAGED TO TURN BACK TIME. I bet its also rewinding time that happened cuz Past mimi couldnt accept Yanzi's death (heart transplant)...