Kaiser is a famous, spectacular, elegant yet brutal lion known for being a local zoo's main attraction. He's the leader of the lion enclosure and you could easily call him the Emperor of the zoo - hence his name. He even has an online account dedicated to him. He's cold and avoidant despite being the leader - he only gained respect through fear before. He could be considered cruel by nature - a perfect predator. Never plays, only calculates. However, some time ago, a new male black panther was brought in to the zoo. He only saw the animal once when it was driving by in a cage on top of a truck - sleek black, graceful and elegant just like him, but in a more... refined, pretty way. And for the zookeepers, it's been hell since that day - Kaiser won't eat ANYTHING, even though he always had such a big appetite. That was until they finally figured it out: he wanted the neighboring black panther. Badly.

The zookeepers were able to make it happen with a glass wall between their enclosures: but what nobody expected was them growing so close they had to put Isagi in the pride's enclosure.

They are now very famous on the internet on the zoo's account, and many people come to see the glamorous couple. Isagi is now practically a member of the family despite being a different species.