Well, Jean Gray's death in the comics can be quite complex. Sometimes it's related to cosmic events or battles with powerful villains. Her powers can also play a role in her demise.
A mature Jean Grey Wolverine fanfic often deals with complex emotions. Instead of just focusing on the surface - level attraction, it explores their deep - seated feelings like love, loyalty, and sacrifice. For example, a fanfic might show how Wolverine is willing to put his life on the line for Jean Grey not just because he loves her, but also because of his sense of honor.
One great fanfic could be 'The Unbreakable Bond'. It delves deep into the complex relationship between Jean Grey and Wolverine. The story is mature in the sense that it explores their emotional and psychological connection against the backdrop of the X - Men universe. It shows how they rely on each other during tough battles and how their relationship evolves over time.
In many fanfictions, Wolverine's rough exterior is softened by his love for Jean Grey. Their love story often involves his unwavering protection of her. For example, he'll stand by her side during battles, his adamantium claws at the ready to fend off any threats. Their relationship is complex as Jean is also involved with Cyclops at times. But Wolverine's love for her is intense, driven by his own tortured past and her kindness. He might steal moments with her in the Danger Room, sharing a silent understanding as they train together.
One popular fanfiction could be 'Soulmates in the X - World' where Jean's telepathic powers lead her to discover a deeper connection with Wolverine. It explores their relationship in a world full of mutant chaos.