The black cat giving the white cat a gemstone wasn't out of courtesy or the joy of a reunion after a long time—mind you, it had only been less than ten days since they last met in the tree.
That pale blue cat's eye was a gift, much like the bouquet Doctor Xiao held up on the pedestrian street, meant to compensate for the regret of Valentine's Day.
The black cat thought of 'using a cat to present a gift' thanks to Dylan mentioning a debate during last Valentine's Day when several warlocks from the Absolution Hunting Team mocked him on the pedestrian street, sparking inspiration in the young cost student.
Last Valentine's Day coincided with the start of the semester in early February, and the cat fruit tree also had a 'tribute' then; that time, the little white cat took away an emerald.
