In some fanfics, Allen might be depicted as dead, but it really depends on the specific plot and the author's creativity. Fanfic writers often take liberties with the original story, so there could be various interpretations.
There could be many interpretations in such a fanfiction. Maybe the Earl has some complex motives behind hugging Allen. It could be a moment of false kindness, where he's trying to manipulate Allen in some way, perhaps by making Allen lower his guard.
I really like 'The Unspoken Connection'. In this fanfic, the chemistry between Kanda and Allen is palpable. It starts with a simple mission they go on together and gradually builds up their relationship in a very believable way. It's a great read for fans of the pairing.
One great fanfiction could be where Lenalee and Allen are on a mission together in a mysterious, ancient castle. They face many challenges and in the process, their bond deepens as they rely on each other's skills.
One great place to find Kanda x Allen yaoi fanfiction could be Archive of Our Own (AO3). It has a large collection of fan - created works for D Gray - Man. Just search for the tags related to Kanda, Allen, and yaoi.
I really liked 'Shadows of Pain: Allen's Journey'. In this fanfiction, the writer takes us through Allen's recovery process after a near - fatal injury. It's full of heart - wrenching moments as we see Allen trying to come to terms with his physical and mental state. There are also some great character interactions that add depth to the story. You should definitely check it out.
One possible aspect of an early fanfic where Allen meets Neah could be the exploration of their complex relationship. Maybe it delves into how Allen initially reacts to Neah's presence, whether with suspicion or a strange sense of familiarity.
The popularity of 'D Gray - Man Allen Hurt' fanfiction lies in the character of Allen himself. He's a complex and deeply sympathetic character. When he's hurt, it amps up the emotional factor. Fans are drawn to seeing his struggle and how he overcomes it.
The plot might also be that the Earl's hug is a way to get Allen on his side. He could be trying to convince Allen that there is a different path than the one he's currently on, and this hug is the first step in that persuasion.