Scar

Scar (formerly Taka) was the king of the Pridelands who succeeded his brother Mufasa and he was succeeded by his nephew Simba.

Backstory
Scar, along with his brother Mufasa, were born during Uru's reign to Ahadi and Uru, he was named Taka because he is Mufasa's littermate, thus what caused him to hate Mufasa and wanted to be king. When Taka was a cub, Ahadi told Taka to calm down and that he will be the future leader of the Lion Guard. Taka was betrothed to Sarafina, who had feelings for him. Unfortunately, Taka's mother Uru died due to a drought, causing Ahadi to rule the Pridelands. Taka became the leader of the Lion Guard when he was an older cub

When Taka was a teen, he first met Zira, the "claimed" future queen of the Pridelands, Taka showed Zira the Pridelands and Zira showed Taka the Outlands back, even golder, Taka told Zira about the Roar of the Elders. When Taka was a young adult, his magical roar killed his guard, which caused his father Ahadi to give him his scar and nickname him "Scar". Ahadi died due to a conversation between Mufasa and Scar, which caused Scar to fight Mufasa on who will be king, Mufasa won the battle and Kahawia, Bianka and Zira were exiled to the Outlands, leaving Scar the other male lion in the Pridelands.

When Simba was born, Scar was no longer the future king, but he was nice to Simba at times. He mated Sarafina and they had Mheetu. He killed his brother Mufasa, exiled his nephew Simba and took over the Pridelands, after he took over the Pridelands, he killed Sarafina and Mheetu and sent all the lionesses into a hunting party. Scar went to look for a queen, he chose his long lost betrothed Zira, who returned to the Pridelands along with her lionesses. Scar chose Zira's son Ziza because Ziza was strong enough to be king.

Scar didn't have a second cub until when Ziza and Gira were teenagers. Zira had Nuka during the drought, but during the drought, Scar's heir Ziza was killed by the hyenas, which caused Gira to become an ordinary lioness. Scar and Zira neglected their son Nuka because he was too weak to be king.

Because Nuka was too weak to be king, Zira gave birth to Vitani, who wasn't neglected unlike Nuka. The drought got for the worst and many lionesses including Sarafina died, so Scar found Kovu and chose him and Vitani to be the future rulers of the Pridelands. When Scar wanted a future leader of the Lion Guard, he tried to choose Nala as his queen, Scar made Nala pregnant with Kopa and Nala left for the jungle.

When Simba returned to the Pridelands, he kicked Scar and exiled the hyenas who killed Scar to the Outlands, but he let Zira, Nuka, Vitani, Kovu, Gira and Scar's most loyal followers because they did nothing wrong. The spirit of Scar lived, but it didn't anymore.