In "Every Last Breath" by Jennifer L. Armentrout, Astaroth, who holds the title of Crown Prince of Hell, expresses his deep and unwavering love for Layla Shaw. He asserts that his feelings for her are not fleeting but timeless, spanning from yesterday through today and into the distant future. This declaration highlights the intensity and permanence of his affection.

The profound nature of Astaroth's love is encapsulated in his promise that whether in the present or a hundred years later, his love for Layla will remain fierce and unchanged. This sentiment underscores the theme of eternal love in the narrative, emphasizing the bonds that transcend even the boundaries of life and death.