Tilda is a supporting character in the 2013 film The Hobbit: The Desolation of Smaug and The Hobbit: The Battle of the Five Armies (the second and third films in The Hobbit trilogy. She was the daughter of Bard and the sister of Sigrid and Bain.
Background
Tilda and Sigrid were characters created for the film and do not appear in any of Tolkien's work.
Personality
Tilda is a playful young girl who is optimistic and brave. She loves her family very much, including her brother, sister, and father. It is unknown how she knew her mother since she died when Tilda was younger. She was very optimistic and open-minded.
Appearances
The Hobbit: The Desolation of Smaug
Tilda's early life is generally unknown. She was born TA 2930 to Bard and an unnamed woman, raised by her single father. While their brother and father were working, Sigrid and Tilda stayed home and Sigrid formed a maternal figure towards her younger sister.
In the fall of 2941, her father smuggled a group of thirteen dwarves and their hobbit freind and companion. When the dwarves came through the toilet, Sigrid wonered why they went throught he toilet while Tilda asked if they'd bring them luck. She later offers Bilbo a blue coat-robe.
Tilda also tried to help the dwarves when four of fourteen of Thorin's company saught her father, Bard since no one else in Laketown would help them.
The Hobbit: The Battle of the Five Armies
Tilda, her sister, brother, Tauriel and Thorin's company escape from Lake-town as Smaug attacks their town. However, Bain runs out to help their father when they spot him climbing up the belltower. On the shores of the lake, Sigrid and Tilda are reunited with their father and brother. They are reunited with their father and brother on the shores and go to Dale, where Thranduil offers his services.
During the siege of Dale, Bain, Sigrid and Tilda run amongst the panicking citizens. They are nearly attacked by a Troll until Bard comes along, first ramming a wheel-barrow before using his sword to finish off the creature. Though their father wishes for them to hide in the Great Hall, Tilda wants to remain with Bard, but they ultimately go hide with the other wounded, women and children
She is last seen at the memorial for those who died during the battle.