I'm not sure which specific 'Guren and Mahiru' light novel you might be referring to exactly. However, if it's within the 'Seraph of the End' series, it typically delves deep into the backstories of Guren and Mahiru. Their relationship is a key aspect of the story, with twists and turns that keep readers hooked. There are also elements of mystery and political intrigue in the series that are explored through their characters.
There are several light novels in the 'Seraph of the End' franchise that feature Guren and Mahiru. These light novels expand on the anime and manga storylines. They offer more in - depth looks at the characters' emotions, motives, and the world they inhabit. For example, we get to see how Guren's actions are influenced by his past with Mahiru, and how their relationship affects the overall fate of the world in the story.
One popular 'Guren and Mahiru' light novel could be 'Seraph of the End'. It has an engaging story with complex characters like Guren and Mahiru. The plot often involves battles, supernatural elements, and the relationship between the characters. It's well - loved for its unique take on the post - apocalyptic world and the power dynamics within it.