The character known only as Giant is a formidable and tragic figure encountered early in the journey to the Lake of Tears. Originally, he was not a giant at all but a large bird. He attempted to deceive and kill the evil sorceress Thaegan, motivated by the desire to save a friend. For this transgression, Thaegan cursed him, stripping him of his true form and transforming him into a massive, human-like creature with tanned skin, a hooked nose, and powerful arms. In this new, cursed body, he was given a large curved sword and forced into eternal servitude as the guardian of a bridge that leads into Thaegan's territory. The terms of his curse dictated that he must challenge all who seek to cross, presenting them with riddles. Those who answer correctly are permitted to pass, while those who fail are killed. The only way for the giant to ever be free is when truth and lies become one.

In terms of personality, the Giant is defined by his rigid adherence to the rules of his curse, though the anime portrays him with a more aggressive and volatile edge than his literary counterpart. He initially attacks Lief, Barda, and Jasmine on sight, waking grumpy and quick to anger. He wields his curved sword with violent intent, but when the companions declare themselves enemies of Thaegan, he halts his assault and agrees to let them attempt his challenges, framing them as a test of their intelligence. During this process, he displays a cruel sense of amusement, grinning as the heroes struggle with his puzzles and shrieking in pain and frustration when they solve them correctly. He possesses a flair for the dramatic, using magical powers not evident in the original story, such as snapping his fingers to conjure the physical components of his riddles and summoning a large hourglass to impose a strict time limit on the participants.

The Giant's role in the story is that of an obstacle and a test, forcing the protagonists to rely on their wits rather than their weapons. Upon meeting the trio at the bridge, he presents each with a unique riddle. For Jasmine, he lays down five sticks and commands her to make the number three without removing any; she succeeds by arranging the sticks into the shape of the numeral three. For Barda, he presents five wooden tablets inscribed with strange symbols and orders him to put them in the correct order. After initial confusion, Barda sees the reflection of his sword in a puddle and realizes the symbols are mirror images of the numbers one through five. He solves the puzzle by slicing the tablets in half, revealing the true numbers. For Lief, the Giant sings a long, complex rhyme detailing the inhabitants of Thaegan's cave, including her thirteen children, each with a toad, each toad with two grubs, and each grub with two fleas. Lief calculates the total living beings as one hundred four, then adds Thaegan herself to reach one hundred five. The Giant informs him he is wrong, as the first line of the rhyme states Thaegan gulps her favourite food, which is a live raven now living in her stomach, making the correct answer one hundred six.

When Lief argues this information was not in the rhyme, the Giant dismisses his complaint, stating it is not his concern what Lief knows. In a desperate move, Lief insults the Giant to buy time and tosses the Belt of Deltora to safety. This act angers the Giant, who proposes a final, fatal game. Lief is allowed to make one statement. If the statement is true, the Giant will crush him; if false, he will cut off his head with his sword. After touching the Belt for guidance, Lief declares, you will strangle me. This creates a logical paradox. If the statement is true, the Giant should crush him, but crushing him would mean the statement you will strangle me is false. If the statement is a lie, the Giant must cut off his head, but cutting off his head would mean the statement was true. This deadlock makes truth and lies become one, precisely fulfilling the condition of the curse. The Giant lets out a final cry as he is freed, transforming back into his original bird form and flying away. Before departing, he telepathically tells Lief he will one day repay his debt. He later fulfills this promise by returning during a major battle between the Resistance and the forces of the Shadow Lord, appearing to save Lief from the aerial attack of the seven Ak-Baba.