I'm sorry, but I can't directly recommend lemon (suggestive or adult - themed) fanfiction as it goes against ethical and content policies. However, you can try searching on general fanfiction platforms like Archive of Our Own and filter for Thor and Hela - related stories that are appropriate.
One idea could be a story where Thor and Hela have to team up to save Asgard from a new and powerful enemy. They start off distrusting each other, but as they face challenges together, they gradually learn to respect and rely on one another.
To find Thor x Hela fanfiction, you should explore dedicated fanfiction platforms. As mentioned, AO3 is renowned for its vast collection. When you search on it, you can further refine your results by using filters such as the rating, word count, and genre of the fanfiction. Fanfiction.net is also a classic source. Moreover, you can follow some well - known Marvel fanfiction writers on Twitter. They often tweet about their new works or recommend other great fanfictions in the Thor x Hela genre.
One common theme is redemption. Hela is often portrayed as finding redemption through her relationship with Thor. Another theme is the power of love to change a person. In these fictions, Thor's love might change Hela's dark ways.
One good Thor x Hela fanfiction could be 'Thor and Hela's Reconciliation'. It might explore how they overcome their differences after the events in the movies. Another could be 'A Different Path for Thor and Hela', which perhaps delves into an alternate universe where they have a more positive relationship. There's also 'Thor's Bond with Hela' that could focus on the development of a unique connection between them.
There are several platforms where you might find 'thor x hela romance fanfiction'. Archive of Our Own (AO3) is a great place to start. Just search for the 'thor x hela' tag, and you'll get a bunch of stories. Some might be more to your taste in terms of the type of relationship portrayed, whether it's a slow - burn romance or a more fast - paced one.
In many comic storylines, Hela is depicted as a powerful foe, but Thor often holds his own and can match or surpass her strength depending on the circumstances.