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 Soul Reapers in the Soul Society would see Ichigo as a major threat. They would likely mobilize their forces to either capture or eliminate him. Captains like Byakuya would be disappointed as he had come to respect Ichigo to some extent, and now would see him as a traitor.
Rukia would probably be one of the first to be both shocked and amused. She might tease Ichigo a bit at first but then quickly get serious about helping him. Chad would be very accepting and offer his protection as usual. Uryu might be a bit more skeptical at first, thinking it's some kind of new Hollow trick. Orihime would be very empathetic and try to make Ichigo feel comfortable in his new form, maybe even offer to make some new clothes for him to fit his new body.
Another idea for the fanfiction could be a time - travel plot. What if Ichigo somehow travels back in time and meets a younger Rangiku? He could influence her growth and development, and in turn, she could have an impact on his view of the past. This would create a complex web of cause and effect, and it would be interesting to see how their actions in the past would shape the future of the Bleach world they know.
There's a fanfic called 'The Bond of Hearts'. It's set in an alternate universe where Ichigo and Orihime are childhood friends. It shows their relationship evolving over the years. It delves deep into their emotions and how they gradually realize their love for each other. The character development in this fanfic is quite engaging.
One great aspect of Bleach Ichigo and Rukia fanfiction is the exploration of their relationship beyond the original story. Writers often delve into their deep bond, showing how they support each other in different situations. It could be in the face of new threats in Soul Society or just in their daily lives. Fanfiction gives a chance to expand on their characters and how they interact, which is really interesting for fans of the series.
One possible reason could be to gain more power. In the Bleach universe, the dead often possess unique powers or knowledge. By raising the dead, Ichigo might be seeking to learn from them or use their power to fight stronger enemies.
One popular character paired with Ichigo is Naruto. Their different power sets and personalities make for an interesting combination. Naruto's positive and determined attitude could contrast with Ichigo's sometimes brooding nature. Another is Luffy from 'One Piece'. Luffy's carefree and adventurous spirit next to Ichigo's more serious approach to protecting his friends can create some great stories.
Ichigo might develop in a more strategic way. Since it's a gamer - inspired story, he could start analyzing his opponents like a gamer does, looking for weaknesses and patterns. This would make him a more calculating fighter compared to his more impulsive self in the original Bleach.
There could be friends who are initially shocked. They might not have expected Ichigo and Senna to start a family so soon. But after the initial surprise, they would come around and offer their congratulations. Maybe they would even share their own experiences of having children or being around pregnant friends.