Aragorn

"If by my life or death I can protect you, I will. You have my sword"

- Aragorn swearing to Protect Frodo

Aragorn II Elessar was one of the main protagonists of The Lord of the Rings.

Background
Aragorn was born in Eriador to Gilraen and Arathorn. He was a descendant of Isildur, who lost the One Ring during the final days of the Last Alliance.

The Battle of the Five Armies
Thranduil tells Legolas to go to the North and look for Strider, warning him that he will one day learn the ranger's true name. He also says his father, Arathorn was a good man.

Arwen
Aragorn and Arwen first met each other when they were in Rivendell. They each fell deeply in love with each other, signifying it was love at first sight. They immediately entered a relationship with each other.

Trivia

 * Aragorn's Hobbit equivalent is Bard and Thorin Oakenshield.