The novel constantly challenges our perceptions of characters and their true intentions. Gen, initially presented as a boastful thief, possesses hidden depths and loyalties. As the story unfolds, we discover that appearances are often deceptive, and even those we trust might harbor secrets. Gen grapples with his own identity, torn between the cunning thief he's known as and the honorable person he could become.

The theme of loyalty runs deep throughout the novel, particularly in Gen's relationships with other characters. His loyalty is tested as he navigates treacherous alliances and encounters those who would betray him for their gain. The reader is constantly left guessing who Gen can truly trust, blurring the lines between friend and foe.

"The Thief" masterfully weaves storytelling into its narrative, highlighting its power to deceive, entertain, and reveal hidden truths. Gen, a natural storyteller, uses this skill to his advantage, manipulating others' perceptions and influencing events. The novel itself plays with storytelling conventions, keeping readers guessing and challenging them to think critically about the narratives presented.