Master Chief's family may have a complex range of reactions. Some might be excited and eager to welcome him back into the family. Others could be hesitant, especially if they've heard rumors or half - truths about what Spartans are like. There could be fear among some family members, fearing that his military life might put them in danger. But overall, with communication and understanding, they would likely come to accept and love him again.
His family would probably be overjoyed. After all, they might have thought they'd lost him forever. There would be hugs and tears, and a flood of questions about his life and what he's been through.
Some of the gaang members might be very excited. Aang, being the Avatar, would probably be curious to learn from Ursa. He could ask her about the Fire Nation's history and how it relates to the balance of the world.
They might be cautious. After all, they don't know her and she's from Percy's world which could be full of unknowns for them.
Some of the Avengers, like Thor, might have a more complex reaction. Since he is Loki's brother, he may feel a sense of responsibility towards the children. Others like Captain America would be cautious but fair, trying to assess if they are a threat. Iron Man, on the other hand, would probably be sarcastic and make some snarky remarks while sizing them up.
They might be in awe. Gallantmon is a very powerful and majestic digimon. They would probably be a bit intimidated at first, just looking at his large and imposing form.
Luke might be in awe. He's always been seeking his family and a sense of belonging, so meeting his parents could make him feel complete. He'd probably listen intently to whatever they have to say.
Thor might be conflicted. He'd see his nephew/niece but also remember Loki's treachery. Iron Man would probably be sarcastic at first, making remarks about the family genes. Captain America would be more cautious and diplomatic, wanting to give her a chance but also being on guard. Black Widow would try to read her body language and motives right away.
They would probably be shocked. Demigods have extraordinary abilities, like being able to control water or run super fast. Percy's mortal friends, who are used to a normal world, would be taken aback by such powers.
They might be terrified. The Dursleys are used to a normal, non - magical world, and Harry's family is full of magic. They could see something as simple as a wizard apparating and completely freak out.
They would probably be very concerned. Jungkook might be the first to approach her and offer his help. They'd do whatever they could to make her feel better, like giving her a warm hug.
Naruto is often full of surprises. He might first act all nonchalant and say it's just a new thing he's trying. But when he sees Anko's serious face, he would start to panic a bit. He could try to make a joke out of it, like 'Hey, Anko - san, this fanfiction - drink is supposed to make me write better ninja stories!'. In the end, if Anko doesn't buy his story, he would probably just bow his head and admit it was a stupid idea.