At the start, Ichigo would be defiant. He would not show any fear in front of Aizen. He might taunt Aizen, trying to get him to reveal his true intentions. As time goes on, he would start to feel a sense of isolation, but this would only strengthen his resolve. He would use his inner Hollow powers more freely, as he has no other option. He would also be constantly thinking about ways to turn the tables on Aizen and escape, and would be ready to take on any challenges that come his way during his captivity.
Ichigo would likely be defiant. He's a fighter and would not easily submit to Aizen. He'd probably be constantly looking for a way to escape and would be sizing up Aizen's every move, trying to find a weakness.
Aizen might be initially dismissive, thinking it's just another mortal event. But as he realizes the potential power the baby could possess, he could become envious or see it as a new pawn in his schemes. He might start observing from the shadows, waiting for the right moment to make his move.
One idea could be that Aizen kidnaps them to use Ichigo's power and Rukia's knowledge of Soul Society for his own dark plans. He might want to study Ichigo's unique Hollow - Shinigami powers up close and use Rukia as a bargaining chip with Soul Society.
Many of the captains would be on the edge of their seats. They'd be closely observing every move Ichigo makes. Ukitake might be silently cheering Ichigo on, hoping that he can succeed where they might have failed in the past against Aizen. And Hitsugaya would probably be analyzing Ichigo's techniques to see how he can improve his own skills.
One possible plot twist could be that Aizen has a hidden motive other than just causing chaos. Maybe he kidnaps Ichigo to use his unique powers for some sort of experiment. For example, he might want to extract the power of Ichigo's Hollow side to enhance his own strength or create a new type of Arrancar. Another twist could be that Aizen is being controlled by an even greater force, and Ichigo's kidnapping is part of a larger plan to draw out other powerful characters in the Soul Society.
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.
Well, in 'ichigo and fem aizen lemon fanfiction', Ichigo is often the more emotional and impulsive one. His reactions to Fem Aizen's actions and presence are key elements. He might be drawn to her in a way that challenges his sense of right and wrong. Fem Aizen could be depicted as having a seductive allure that she uses to her advantage. She might also have a more complex backstory related to her femininity in this fan - created world. Her relationship with Ichigo is usually full of tension and a sort of forbidden attraction due to their different natures and the history between Aizen and Ichigo in the original Bleach storyline.
His friends like Rukia or Chad could come to his rescue. They care about Ichigo deeply and would surely try their best to find and save him.
Rukia would be extremely shocked and disappointed. She has always seen Ichigo as a force for good, and seeing him side with Aizen, who is the main antagonist, would be a huge blow to her. She might try to talk Ichigo out of it at first, and if that fails, she could become his enemy.
In 'ichigo and aizen lemon fanfiction', the focus is usually on the dynamic between Ichigo and Aizen. It might play with the idea of their rivalry in a more intimate or emotional context. This can add new layers to their characters. However, not all such fanfictions are well - written. Some might over - emphasize the 'lemon' aspect and lose the depth of the characters' relationship.