Since I don't have the details of this fanfic, I can only speculate. It could be that in this fanfic, Bellatrix is in a state of vulnerability and the Grims are there for a particular reason. Maybe it's a part of a larger story arc within a fan - created universe. The author might be trying to explore the relationship between Bellatrix and these mysterious Grims. It could also be a creative take on the existing lore, perhaps adding new dimensions to Bellatrix's character and the nature of the Grims in this fictional world.
Well, to find the 'bellatrix guarded by grims fanfic', you need to explore various online spaces. Archive of Our Own (AO3) is a great place to start. Their search engine is quite powerful. Enter the title and see if it pops up. FanFiction.net is another old - time favorite for fanfic seekers. If it's a more niche or specific fanfic, it might also be shared on Tumblr within relevant fan communities. There could also be some smaller, dedicated Harry Potter fanfic sites that might have it. However, it may take some time and patience to search through all these places to actually locate it.
One possible plot could be that Harry discovers some ancient magic that gives him the power to control the Black family Grim. He might use this power to uncover secrets within the Black family that were long hidden. Maybe he uses it to protect the family from dark forces that are after their power or knowledge related to the Grim.
Well, without having read the 'a guarded heart novel', it might be a love story where the main character has a guarded heart. Maybe they've been disappointed in love before and are now cautious. The plot could involve someone trying to break through those defenses and win their love.
The 'harry drinks from bellatrix fanfic' could be centered around a number of ideas. It could be a story that delves into the complex relationship between Harry and Bellatrix in a very unique way. The 'drinking' might be related to a memory transfer, where Harry drinks something provided by Bellatrix that gives him access to certain knowledge or experiences. It could also be part of a plot where Bellatrix is trying to corrupt Harry in some way by making him drink something evil or enchanted. Another possibility is that it's a form of magical healing or sustenance within the fanfic's universe, but with a strange connection between these two characters.
In a time - travel Bellatrix fanfic, she might go back to the time when she was first introduced to the Dark Arts. This could show a different side of her, perhaps a more innocent - looking but still dark - inclined Bellatrix. She could interact with younger versions of other Death Eaters and form different alliances that change the course of the future in the wizarding world.
One possible plot could be that Bellatrix's kiss is part of a mind - game she's playing with Harry. Maybe she's trying to get some information from him while also confusing him with this unexpected act. Another plot might be that it's a hallucination Harry has due to some dark magic influence. He then has to figure out if it was real or not and what it means for his fight against Voldemort.
One great 'Bellatrix, Snape and Love' fanfic could be one where Bellatrix's unrequited love for Snape is explored. In this type of story, Bellatrix's dark and obsessive nature might be in conflict with Snape's own complex emotions. Maybe it shows how Snape, being a double agent, has no room for such a dangerous and unpredictable love in his life.
One possible plotline could be Bellatrix's unwavering loyalty to Voldemort being tested. Maybe she discovers something about Voldemort's past that makes her question her blind devotion. For example, she could find out about some of his more cowardly actions that he has kept hidden from his Death Eaters. Another could be a scenario where Bellatrix tries to prove herself even more to Voldemort by taking on a dangerous mission that he initially doubts she can handle. This could lead to a deeper understanding between them, or it could backfire and cause a rift.
One possible plot twist could be that Harry, under Bellatrix's influence, becomes a much darker and more ruthless wizard. Bellatrix might train him in the Dark Arts, and he could end up being a sort of anti - hero. He might have a completely different view of the wizarding world and be at odds with his former friends from Hogwarts.
One possible plotline could be Bellatrix trying to mold Harry into a dark wizard. She might use her knowledge of the Dark Arts to teach him, but Harry resists. Another could be that Bellatrix starts to have a change of heart while raising Harry and begins to question her loyalty to Voldemort. Maybe she sees something in Harry that reminds her of a better part of herself.