Hiccup could be very confused. On one hand, he respects his family or the authority that is forcing him to marry Astrid. On the other hand, he doesn't know Astrid well enough to be comfortable with the idea. He might start by trying to communicate with Astrid about their situation, hoping to find a way out together. If she's also not happy about it, they could form an alliance of sorts. But if Astrid seems okay with it, Hiccup would have to deal with his own mixed feelings. He might also worry about how this would affect his relationships with his friends and his role in the community.
Initially, Hiccup would probably be shocked and angry. He has his own dreams and plans, and this forced marriage would disrupt all of that. He might be sulky and distant towards Astrid, not wanting to cooperate. However, as he gets to know her better, he might realize that she's not so bad. He could start to develop feelings for her, but still struggle with the idea of being forced into the relationship. He might then try to turn the situation around and make it a real, loving marriage on his own terms.
Hiccup might be very resistant at first. He's always been an independent thinker, so being forced into a marriage would go against his nature. He could try to find ways to escape the situation, like running away or finding loopholes in the marriage contract. But as he spends more time with Astrid, he might start to see her in a different light and become more accepting of the situation.
Astrid might initially be in shock. She could just stand there, frozen, unable to believe that Hiccup is really gone. Her eyes wide open and her body trembling as she tries to process what has just happened.
Hiccup would probably be very worried. He'd rush to her side immediately. He might start to check her injuries right away and call for help if needed.
Well, one plot twist could be that Hiccup discovers a long - lost family secret that changes the whole reason for the forced marriage. Maybe his family has a hidden alliance with Astrid's family that he was unaware of. Another could be that Astrid herself is against the forced marriage at first but then realizes she has real feelings for Hiccup during the process of getting to know him better. Or perhaps there's an outside force, like a villain, who is trying to use the forced marriage to their advantage but Hiccup and Astrid end up joining forces against them.
Their friends are likely overjoyed at first. Fishlegs might be a bit of a nervous wreck, constantly worrying about Astrid's health and the well - being of the baby. He'd probably be reading every book he can find on dragon - rider pregnancies (if that's a thing in their world). Snotlout would probably make a bunch of inappropriate jokes at first, but deep down he's also excited. Ruffnut and Tuffnut would be their usual chaotic selves, but also show their support in their own unique ways, like bringing strange gifts they think the baby would like.
Well, he might be initially shocked. He could stand there for a moment, his eyes wide open, trying to process the news. Then, he would probably break into a big smile and hug Astrid tightly, whispering words of joy and excitement.
It develops gradually. At first, they might be just friends who respect each other's skills. But as they go on more adventures together, they start to notice little things about each other. For example, Hiccup notices how Astrid is always the first to volunteer for dangerous tasks because of her bravery. And Astrid sees how Hiccup's intelligence always gets them out of tough situations.
Their relationship might become more equal in some ways. As dragons, they are both facing a new and strange existence, so they have to rely on each other more. They might develop a new understanding of each other's strengths and weaknesses.
The relationship between Hiccup and Astrid during her pregnancy would be a journey of growth. Hiccup would have to be more patient as Astrid's hormones might make her moody at times. Astrid would rely on Hiccup more, which could be a big change for her. They would also start making plans for their family, like where the baby will sleep and how they will raise it. Their love would transform from the passionate love of two young adventurers to a more profound, family - centered love. They might also have some cute moments, like Hiccup talking to the unborn baby at night, which would make Astrid feel even more loved.
Artemis would be in shock initially. Given her status as a powerful and independent goddess, the idea of being forced into marriage is unthinkable. She would likely try to use her divine powers to break free from the situation. If she can't do it immediately, she might start to negotiate. She could offer other things in exchange for her freedom from this marriage. And if Percy shows any sign of taking advantage of the situation, she would not hesitate to put him in his place.
Naruto would probably be extremely confused at first. He has always seen Itachi as a complex figure, and suddenly being forced to marry him would be a huge shock. He might feel angry that he has no say in this. Itachi, on the other hand, would likely be stoic on the surface but internally be very conflicted. He has his own burdens and this unexpected situation would add to them.