One great Alastor deer tail fanfiction is 'The Enchanted Tail' which delves into the magical aspects of Alastor's deer tail. It has a really interesting plot where the tail seems to have a mind of its own at times.
The magical beast, Paruzixia Deer, could eat Hawaiian Zixia Deer Burger Rice, Buba Beef Cheese Burger, Grass Pig Hot Dog, Cream Bacon Spaghetti, and other food. In addition, the venison of Zixia Deer could also be used to make Hawaiian Zixia Deer Burger Rice, Zixia Deer Grilled Meat, and Zixia Deer Stew. However, the search results didn't mention what the best food for Purple Glow Deer was, so they couldn't give a definite answer.
In this fanfiction scenario, Alastor's reaction would likely be a mix of curiosity and amusement. He'd be curious about what exactly draws this female to be such a big fan of his. Is it his power? His style? His radio shows? He'd be amused by her enthusiasm, seeing it as a form of entertainment. However, he'd also be cautious. He doesn't trust easily, and this female fan would need to prove herself worthy of his time and attention. He might test her loyalty or knowledge about him in various ways, like quizzing her on his past deeds or his preferred methods of causing chaos.
One possible plot could be that Alastor meets a female fan who is completely in awe of him. He initially might be amused by her admiration. They could start chatting about his radio shows or his powers, and she could end up becoming his sidekick of sorts, helping him with his 'broadcasting' of chaos in Hell.