The character of Tauriel was created for the films, having no equivalent character in the original novel. She first appears in the second film of the trilogy,
The Desolation of Smaug, released December 13, 2013. Prior to the decision to have three films instead of two, Tauriel was described as having a more substantial role in what was then the final film,
The Hobbit: The Battle of the Five Armies, which had been planned for release in 2013, but was finalized as the third part of the trilogy, which was released in December 2014. In
The Desolation of Smaug, the hobbit
Bilbo Baggins and thirteen
dwarves, while traveling to
Lonely Mountain, pass through the black forest of
Mirkwood, where they are attacked and captured by giant spiders. The spiders are then attacked by the
Wood Elves, led by
Legolas and Tauriel. Tauriel in particular saves
Kíli by killing two spiders that attacked him, but the Elves subsequently take the dwarves as prisoners for trespassing on their land. Later, Tauriel is recognized as a talented warrior and therefore leader of the Mirkwood border guards.
Legolas, the son of Mirkwood's Elven king
Thranduil, is attracted to her, but she does not believe herself worthy of him as a Silvan Elf. Thranduil, in fact, makes it clear that he does not consider her to be a suitable match for his son and warns her not to give Legolas false hope. During the dwarves' imprisonment, Tauriel forms a romantic bond with Kíli. When the dwarves escape with
Bilbo's help, the pursuing Elves are attacked by
orcs, during which Tauriel again uses her fighting skills to save Kíli, though Kíli is struck in the leg with an orc's arrow, which Tauriel later learns from a captured orc is
a Morgul-cursed weapon that will slowly kill him. Just before Thranduil seals off his kingdom upon learning that an evil entity has returned and is amassing great power in the south, Tauriel goes after the dwarves. Legolas follows, and initially tries to convince her to return, but when Tauriel refuses, saying that the Elves are part of Middle-earth and will be drawn into this inevitable war, Legolas joins her pursuit. After acquiring provisions at
Esgaroth, the dwarves leave for the Lonely Mountain. Kíli, Fili, Bofur and Óin stay behind, with Kíli suffering from the effects of the poison. By the time Tauriel and Legolas reach Esgaroth, the dwarves are being attacked by orcs. They repel the invaders, and Tauriel uses her knowledge of herbs and elvish medicine to heal Kíli's wound, saving his life once again. In
The Hobbit: The Battle of the Five Armies, during
Smaug's attack on Esgaroth, Tauriel and the dwarves facilitate the evacuation of
Bard's family, though Bain leaves their company and helps Bard kill Smaug. The following morning, as the dwarves set out for Erebor to rejoin their company, Kíli asks Tauriel to come with them, but her duties with Legolas forces them to part. When a messenger from Thranduil arrives to announce her banishment from the Mirkwood Realm for disobeying his orders, she joins Legolas in investigating the old fortress Gundabad, where they witness the departure of an army led by Bolg to join the forces of his father Azog marching against Erebor. Hurrying towards the mountain, the two Elves arrive in the thick of the Battle of the Five Armies. When Tauriel witnesses Thranduil attempting to leave the battlefield, with the intent of sparing his people further bloodshed, she accuses him of turning away and abandoning the dwarves to be slaughtered. Thranduil states that the dwarves are fated to die, as they are mortal and thus the timing of their demise does not matter. Tauriel then nocks an arrow; pointing it at Thranduil as she queries him whether he believes his life is more valuable than those of dwarves, and proclaims that he is devoid of love. Thranduil, dismissing the notion that Tauriel's regard for Kíli is genuine love, destroys her bow and threatens her life. However, he backs down when his son Legolas intervenes saying, "If you harm her, you will have to kill me." Learning that Kíli had joined
Thorin's pursuit of Azog, she and Legolas hurry to Azog's command post, the Ravenhill, to aid the dwarves. Running to find Kíli, Tauriel is intercepted and brought to her knees by Bolg. Before the Orc can strike the fatal blow, however, Kíli comes to her aid, and Bolg kills him instead. In retaliation, Tauriel tackles Bolg, throwing him and herself off a ruined platform onto the rocks beneath, thus leading to Bolg's final battle with Legolas, who kills Bolg. Following the resolution of the battle, Thranduil finds Tauriel weeping over Kíli's body, acknowledging that her feelings for the young dwarf were indeed genuine. ==Conception and casting==