Chad would be excited and happy for them. He's always been a loyal friend to Ichigo, and he would see Yoruichi as a great match for him. He might even offer to help with the wedding preparations.
Their friends would be really excited. Chad would probably be happy and offer to help with any heavy lifting or physical tasks around the house for when the baby arrives. Uryu might be a bit more reserved but still show his support in his own way, like making some special baby clothes. Rukia would be thrilled and would be constantly visiting, giving Orihime advice on motherhood.
Their friends might be initially shocked. For example, Orihime, who has feelings for Ichigo, could be heartbroken at first. But then she might see how happy Ichigo and Rukia are together and come to accept it. Chad, on the other hand, would probably be very supportive. He's always been a good friend to Ichigo and would likely see that Rukia makes Ichigo a better person, so he would encourage their relationship.
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.
Orihime would probably be over - the - moon excited. She's always been a kind - hearted and emotional person. She would immediately start knitting baby clothes or making cute little charms for the baby. Chad would be very supportive as well. He would offer his strength to protect Rukia during her pregnancy. Uryu might be a bit more reserved at first, but deep down he would be happy for them. He might use his Quincy skills to create some sort of protective item for the baby.
Chad would be a very protective and gentle presence. He would be like an uncle to the baby, always ready to pick the baby up and play with it. His calm and strong nature would make the baby feel safe.
Their friends would have a wide range of reactions. Ishida would be the one to make sure everything was in order, like the invitations and the seating arrangements. He would be very meticulous. Renji would be all excited and would probably want to show off some new moves during the wedding reception as a form of celebration. Orihime's friends from school would be squealing with excitement, constantly talking about the wedding and how beautiful Orihime will look. And Ichigo's dad would be a bit of a wild card, maybe causing some chaos in the name of celebration but also being really proud of his son.
Their friends would probably be really surprised at first. Orihime might be super excited and start making all kinds of baby clothes and accessories for them. Chad would be happy for them in his quiet way, and Ishida might be a bit more reserved in his reaction but still offer his support.
His friends might be in awe. After Ichigo meets his real Zanpakuto, his friends could be both amazed and a little bit intimidated by the new power he has. They would still support him, but there could be a new sense of respect and a bit of distance as they realize how much stronger he has become.
Ancient Ichigo in strong Ichigo fanfics is different from regular Ichigo in several ways. For one, his power might be more raw and primal. Regular Ichigo has developed his powers over time in the canon story, but ancient Ichigo's power could be something that was inherent from the start, less refined but more powerful in a different sense.