The Strongest is a very muscular and big looking lion. He has blue eyes and a dark brown nose. He has orange-brown fur and a dark brown mane, in which you can see five red, deep claw markings.
Nothing is known about his personality, but he seems to be the strongest because he seems to be well built (strong shoulders, big muscles, powerful body). He was devoted to protecting the Pride Lands and the Circle of Life, that he refused the order of his leader Scar to aid him in usurping Mufasa.
The Strongest Lion was born in the Pride Lands under the rule of the Lion King and Queen at that time. At some point either in his childhood, or his adolescence, he was chosen by Prince Askari, Prince Mufasa's younger brother as the strongest member of the Lion Guard.
Sometime during Mufasa's reign as King, Askari was bitten by a cobra and nicknamed Scar by his older brother, a nickname which he would soon accept as his name. As a result of Mufasa's mockery of him, Scar ordered the Lion Guard to help him kill Mufasa. However, when they refused, Scar used the Roar of the Elders to kill them all, ending his time as leader of the Lion Guard, as well as the Lion Guard's legacy on the Pride Lands.