First, know the character of Jaden Yuki well. Read up on his backstory, his mannerisms, and his relationships in the original series. This will help you create a more believable interaction with the reader. For the 'lemon' part, if you choose to include it, be subtle and build up to it. Don't just jump into it right away. Use descriptive language to set the mood and the emotions between Jaden and the reader.
The character development. If the author can take Jaden Yuki's known traits from the original series and expand on them in a new and exciting way within the fanfic, it can be really interesting. For example, showing a more vulnerable or passionate side of him.
Well, in some fanfictions, Jaden Yuki might not directly fight the wicked gods. Instead, he could be trying to understand their motives. He might befriend some characters who have knowledge about the wicked gods and through that knowledge, he tries to find a way to either co - exist or stop their evil plans.
Well, while I can't really point you to specific 'Jaden Yuki Harem Lemon Fanfiction', if you are into Jaden Yuki stories in general, you could start by joining relevant fan communities. These communities often share and discuss different types of fanfictions. They might be able to give you some leads on where to find good stories without necessarily being the 'harem lemon' type which can be a bit inappropriate in some contexts.
The popularity might also stem from the fact that it offers a different perspective on the Jaden Yuki character. In the original series, his relationships are more platonic. But in these fanfictions, it delves into a romantic realm. The 'x reader' format makes it very inclusive for fans. They can put themselves in the story and experience a relationship with Jaden in a fictional but exciting way. The 'lemon' part, while it can be a bit more risqué, is also a draw for some fans who like that added touch of spice in their fictional relationships.
The 'Jaden Yuki Harem Lemon Fanfiction' is different from other fanfictions in several ways. Firstly, the harem element means that there are multiple love interests for Jaden Yuki, creating a complex web of relationships. This is not common in all fanfictions. Secondly, the 'lemon' aspect, which if we consider it in a non - explicit sense, implies a more intense and passionate form of relationships compared to the more platonic or simply friendly relationships often depicted in other fanfictions. However, it should be noted that such fanfictions often walk a fine line in terms of content appropriateness.
One common theme is the exploration of different dueling universes. Since Jaden is from 'Yu - Gi - Oh! GX', crossovers often take him to other 'Yu - Gi - Oh!' series or even other card - game - based anime worlds to experience new dueling rules and challenges.
Well, another option could be to check out some dedicated Yu - Gi - Oh! fan forums. There might be threads where fans share their own Jaden Yuki lemon fanfics or recommend some good ones they've read. But be aware that the quality can vary greatly, so you might have to sift through a bit to find the really great ones.
Romance is also quite prevalent. It could be a love story between female Jaden and another character from the series, like Syrus or Chazz. The authors often put their own spin on how the relationship develops.
One common antagonist could be the Society of Light. In fanfiction, they might target Jaden more aggressively than in the original series. They could try to manipulate him or harm him to further their own goals of 'purifying' the Duel Academy. Another antagonist could be a rogue duelist who has a vendetta against Jaden for his success. This duelist might use underhanded tactics to try and hurt Jaden during duels, not just aiming to win but also to cause him physical or emotional pain.