Death Battle: Zuko vs Mako

Zuko:
Zuko is a firebending master, born as a prince in the Fire Nation Royal Family, who held the title of Fire Lord from 100 AG to 167 AG. Initially Team Avatar's primary enemy, Zuko's early life revolved around trying to capture the long-lost Avatar to end his banishment and regain his honor as Crown Prince of the Fire Nation. He is recognizable by the distinctive scar on the left side of his face, which was given to him by his father, Fire Lord Ozai, shortly before his banishment as a result of an incident in which he unintentionally disrespected his father by speaking out of turn and refusing to duel him.

With support from his uncle, General Iroh, and after much internal struggle and turmoil, Zuko rejected Ozai and his model of the Fire Nation. He instead joined the Avatar's group to become Aang's friend and firebending teacher and was determined to end the war and restore both his and the Fire Nation's honor. While Aang defeated Ozai, Zuko, with the help of Katara, defeated his prodigious younger sister Princess Azula and took his place as Fire Lord, declaring the end of the Hundred Year War and the start of an era of love and peace.

At the beginning of his reign, Zuko had to overcome great difficulties and solve several crises, especially those caused by the Harmony Restoration Movement and the New Ozai Society. Nevertheless, he succeeded in maintaining peace and eventually became one of the founders of the United Republic of Nations. Zuko retired from his position as Fire Lord in 167 AG and became an ambassador of peace, relinquishing the throne to his daughter, Izumi.

When he learned in two weeks after Harmonic Convergence in 171 AG that the Red Lotus had escaped their prisons, Zuko once again set out to help the Avatar to protect the world.

Mako:
Mako is a firebender from a multicultural family who grew up on the streets of Republic City as an orphan with his younger brother, Bolin. Mako always wore his signature red scarf that was once his father's, who was murdered along with his mother when he was a boy. He formed a pro-bending team with his brother and Hasook and aspired for his new career to bring him fame and fortune. His aspirations changed, however, when he met Avatar Korra, who joined the team to replace Hasook and became a loyal friend. Mako, with the help of his teammates, was able to lead the team to second place in the championship. After the tournament's conclusion, Mako joined Korra in her efforts to stop the Equalists.

In the following months, Mako joined the Republic City Police Force, where he steadily rose up from being a beat cop to a detective. He joined his friends in an effort to stop Unalaq and Vaatu from merging. A few weeks after Harmonic Convergence, he rejoined Team Avatar in their search for new airbenders. However, they stopped when the Red Lotus attempted to kidnap Korra in Zaofu, instead working to bring down the anarchist organization.

After taking down the Red Lotus, Mako returned to his work as a police officer and was later appointed as Prince Wu's bodyguard, a position he continued in after the latter's coronation as Earth King.