* Symbolic of his past: The eyeliner represents the dark sand markings he had as a child, a result of Shukaku, the one-tailed beast sealed within him. These markings were a symbol of his fearsome power and isolation, making him a "monster" in the eyes of others. The eyeliner, while stylized, evokes this past and acts as a reminder of his journey from loneliness to acceptance.
* Visual representation of his personality: Gaara's eyeliner helps to visually represent his personality. He is a strong, determined, and often stoic character. The eyeliner adds an intensity to his look, reflecting his powerful nature.
* Aesthetic appeal: In addition to symbolism, the eyeliner also simply looks good! It's a common stylistic choice in anime and manga, and it helps to make Gaara stand out as a cool and intimidating character.
* Cultural influences: Eyeliner is a common cosmetic item in Japanese culture, especially among men. It can be used to accentuate the eyes, add a sense of depth, and even be a way to express oneself.
It's worth noting that Gaara's eyeliner isn't just about his looks; it's a powerful symbol of his past, his growth, and his current personality. It contributes to his visual identity and helps to make him a compelling and memorable character.