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.
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.
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.
There were a few novels that could be recommended. One of them was " Nirvana Rebirth: The AdorkablePrincess Wants Candies." The protagonist wanted to eat candy the first time they met, and the plot was very sweet. The other book was " You're Not as Bright as I Am ". The first time the male and female leads met was during an internship. The female lead grabbed the male lead's wrist and refused to let go. The male lead refused the female lead's invitation, but in the end, he sent the female lead home. The other book was " The Conquest Game: A Beautiful Wife Is Hard to Tame." The male and female protagonists met for the first time in a bar, and the male protagonist mistakenly thought that the female protagonist was a lady. The second time they met was on the racing track. These novels all have different plots and backgrounds. I hope you can choose a novel that you like according to your preferences.
Well, one possible scenario is that Ichigo could try to warn his younger self about the upcoming battles and hardships. He might give some tips on how to better control his powers from the start, which could potentially change the course of his journey in the original story.
Ichigo would likely be a bit brash at first. He's used to dealing with things on his own terms in the world of 'Bleach'. Izuku, on the other hand, would be very respectful and inquisitive. He'd probably ask a lot of questions about Ichigo's powers. Ichigo might be a bit impatient with all the questions but would soon realize that Izuku is genuinely interested. They'd start to bond over their shared desire to protect others.
Their powers might interact in a very chaotic way. Since Ichigo's powers have evolved over time, his older self's more refined and powerful reiatsu could either overshadow or disrupt his younger self's still - developing powers. It could be like a clash of two similar but not exactly the same energy sources.
One possibility is that Ichigo could try to change certain events in his past. For example, he might want to prevent a tragedy that occurred or give himself some advice that would make his journey easier. He could also end up causing more chaos if he interferes too much, as small changes in the past can have big consequences in the future.
In this fanfiction concept, the interaction of their powers is quite interesting. Since Ichigo's power has evolved over time, his past self may have a purer, more instinctual form of his abilities. When they meet, the future Ichigo's power, which has been through more battles and growth, could act as a catalyst for the past Ichigo's power. It could be like a spark that ignites a new level of understanding and control for the younger Ichigo. On the other hand, the past Ichigo's power, which is still in a more nascent state, might reawaken a sense of rawness in the future Ichigo's power. This could lead to the discovery of new techniques or a different way of using his existing powers for both versions of Ichigo.