In the book "Onyx" by Jennifer L. Armentrout, a character is depicted deep in thought, his furrowed brows indicating his intensity. Thick, dark lashes obscure his eyes, suggesting a sense of mystery. When his eyes finally reveal themselves, he breaks into a grin, which hints at an impending challenge for the narrator.

The narrator senses an overwhelming sense of trouble approaching as the character's expression shifts from concentrated to playful. This moment underscores a tension between foreboding and intrigue, suggesting that the protagonist may soon find themselves in a complicated situation due to this interaction.