Solo Leveling emphasizes the importance of strength and rank, with protagonist Sung Jin-Woo standing out as both the weakest and the most powerful character in the series. Initially struggling as a low-ranked Hunter, Jin-Woo gains strength and abilities through the System, enabling him to rise through the ranks and become the formidable Shadow Monarch. The series explores themes of growth, sacrifice, and overcoming challenges as Jin-Woo navigates a conflict between Rulers and Monarchs. With a simple premise that escalates into high stakes battles and deep lore, Solo Leveling captivates readers with its RPG elements and rewarding character development.

Sung Jin-Woo's transformation from weakest to strongest character underscores the series' central theme of growth and perseverance.