The big cat is a pet. It accompanies its master throughout the world, witnesses his master's growth from weak to strong, and watches his master's friends come and go. Later, the big cat also grew old and could no longer accompany his owner all the time.
(But the big cat will not know that it is just a pet in the game world, just like the owner's friends will suddenly disappear from its world, and one day, the owner will also disappear)
Purpose: Gain strength from friendship