King Raiza

""AAAAH" shut up! What, never seen a talking lion before? You live in a world where people can shoot fire, sometimes literally outta their ass! And a talking lion is what gets you?"

- King's typical response to a surprised human at finding out he speaks King Raiza (キングレーザ, Kingu Rēza) is a lion, previously held as a test subject by an unknown testing facility, afterward managing to escape alongside other test subjects, ending up as a part of a circus afterwards, becoming known as the Circus Star (曲馬星, Kyokubahoshi). However, due to the modifications done to him, King became proficient in a magic exclusive to him, later causing him to escape the circus, beginning to wander on his own.

At some point, King crossed paths with Myst Kagekyo, resulting in a battle, which ended with King Raiza befriending and joining Myst's crime syndicate, Ange Déchu, serving as the "team mascost", according to himself.

Trivia

 * King confirms that his given name is "King", surname "Raiza".