Happy would be super excited. He'd probably be constantly flying around them, chattering about how great it is and already planning all the things he wants to do with the baby when it's born. Wendy would be very gentle and caring. She might use her healing magic to check on Lucy's health regularly and offer any assistance she can with any pregnancy - related discomfort. And Carla would be the voice of reason, making sure everyone doesn't go overboard with their excitement and ensuring that Lucy has a calm and peaceful environment.
Their friends would likely be shocked at first. Happy for them, but also a bit worried. Erza, for example, would probably be very protective. She might start giving Lucy all sorts of advice on staying healthy and safe during the pregnancy. Gray might be a bit awkward around the whole situation at first, but would eventually warm up and offer his support in his own way, like helping Natsu with any odd jobs or tasks so he can focus on Lucy.
Erza would probably be very protective. She would make sure Lucy has everything she needs and would be strict about her safety. Gray might be a bit awkward at first, but then he'd be supportive. Happy would be over the moon. He'd constantly be around Lucy, bringing her fish and trying to cheer her up. Wendy would be excited and would offer to use her healing magic to check on the baby's health regularly.
Some of their friends might be worried at first. They know the dangerous lives that Natsu and Erza lead. But then, they would all come around and be very supportive. They could throw a big celebration for the pregnancy, and everyone would chip in to help make a comfortable space for the baby in the guild. There would be a sense of new hope and family spirit in the group.
Some fans would be really excited. They might love the idea of seeing their favorite characters in a more mature and family - oriented situation. It could add a new dimension to the Natsu - Lucy relationship that they've always wanted to see.
Their friends would likely be shocked at first. For example, Gray might be initially speechless and then crack some jokes about Natsu finally becoming a family man. Lucy would probably be super excited and offer to help Mira with anything she needs, like shopping for baby clothes or setting up a nursery.
Erza would probably be very protective. She would make sure Mirajane is taking proper care of herself and would offer practical advice on things like diet and exercise during pregnancy. Gray might be a bit awkward at first but would warm up and offer to help with any heavy lifting or tasks around their home.
Some of their more light - hearted friends, like Happy, might make jokes about Natsu becoming a father. But overall, the Fairy Tail guild would come together to support them. Makarov, as the guild master, would ensure their safety and provide any resources they need. And Levy might be researching about pregnancies in the magical world to give them advice.
Natsu would probably be really excited at first. He'd be all over the place, asking a million questions and making sure Lucy is okay. Happy would be right there with him, trying to help in his own little Exceed way. Erza would be very protective. She'd make sure Lucy follows all the proper precautions and would offer to train her gently so she doesn't lose her fighting edge during pregnancy. Gray might be a bit awkward at first but would soon warm up and offer his support, like helping with any heavy lifting around Lucy's place.
She might start to blush furiously. Given her character, she is a bit shy when it comes to romantic matters. And then she might start to stammer out a response, not really sure what to say at first. As she composes herself, she could tell Natsu that she has feelings for him too but in a very gentle and sincere way.
Natsu would likely be extremely guilty. He might immediately stop whatever he was doing and rush to Lucy's side.
Well, Natsu is a passionate character. He could react with a lot of excitement. He might pick Lucy up and spin her around, laughing and saying how amazing this is. Or, he could also get a bit worried and start asking Lucy all sorts of questions about her health and what they need to do next.