One possible plot could be that Ichigo, after fusing with Zangetsu, gains new and enhanced powers. He might have to face a powerful new enemy that only his fused form can defeat. Maybe he struggles at first to control the combined power, causing some chaos in the Soul Society.
One of the main attractions in Hollow Ichigo x Ichigo yaoi fanfiction is the exploration of their psychological connection. Since Hollow Ichigo is a part of Ichigo, it's like a self - exploration but in a more romantic or sexualized way in yaoi. The fanfiction might show how their relationship evolves from a state of conflict, where Ichigo is constantly fighting against Hollow Ichigo, to a more harmonious or at least an understanding one. This can be really appealing to readers who are interested in character development within the framework of a non - traditional relationship.
Well, one aspect could be the exploration of the relationship dynamic between Ichigo and the female Hollow Ichigo. It might delve into how their opposing natures interact, like Ichigo's heroic side and the Hollow's more chaotic nature. It could also show how they influence each other's growth in the fanfiction world.
Rukia would probably be both amazed and a bit worried. Amazed at the new power Ichigo has, but worried about how it might change him. Chad would see it as a natural progression of Ichigo's power and be supportive. Orihime might be a bit scared at first, but then she would see the good in Ichigo's new form and try to encourage him.
The relationship can start with respect. Since Zangetsu is a powerful entity, Ichigo would initially respect her strength. As they interact more, like during training sessions, they can start to share personal stories. This sharing can lead to a deeper emotional connection.
A common theme is the exploration of their dual natures. Since Ichigo has his own powers and the female hollow ichigo has her unique hollow characteristics, fanfictions often play with how these two different yet connected aspects interact.
Perhaps in the fanfiction, Female Zangetsu has been separated from Ichigo due to some dark magic. Ichigo then has to embark on a journey to find her. Along the way, he discovers more about her past and her true nature, which deepens his love for her when they are finally reunited.
I'm not sure of the exact name, but there's a fanfiction where female hollow ichigo gets separated from Ichigo during a battle. It then follows her own adventure to find her way back to him, while Ichigo is also searching for her. It's a story full of action and their unspoken bond.
A common theme is the struggle between light and dark. Ichigo represents the light side, while Hollow Ichigo is the dark. Their relationship in yaoi fanfiction often shows how these two opposing forces interact and potentially find a balance. Another theme could be self - acceptance. Ichigo accepting his Hollow side in a more intimate way is often explored.