He would probably be very polite. Canada is often depicted as a polite nation, and this would likely carry over to his human form. He might be a bit shy, too, since he sometimes gets overlooked in the Hetalia series. Also, he would be very knowledgeable about nature and the outdoors, given Canada's vast and beautiful landscapes.
She could be brave. Since dealing with a king cobra is extremely dangerous, her fearlessness would be a key trait. For example, she might not flinch when the cobra hisses at her or makes sudden movements. She could also be curious. This would drive her to interact with the cobra in the first place, wanting to learn more about its behavior and habits.
Well, perhaps in the fanfiction, Canada turns into a baby due to some magical mishap. The nations have to search for a way to turn him back. Meanwhile, baby Canada is just exploring the world around him innocently. He might crawl over to England's tea set and accidentally break a cup, leading to England's typical over - reaction.
A possible plot is that Canada, now human, decides to go on a journey across his own land to see how much it has changed and how different it is from his memories as a nation. Along the way, he meets various people who unknowingly are descendants of those who were part of Canada's history. He could also encounter challenges like trying to prove his identity to those who are skeptical of his claims of being the nation Canada in human form. He might use his unique knowledge of the land and its past to overcome these difficulties.
It might be about Canada in the Hetalia universe going through a sudden change, like snapping. Fanfictions in the Hetalia fandom often take the existing personalities of the characters and push them in new directions. So this could be about Canada breaking free from his usual shy and reserved self and doing something unexpected, perhaps standing up to the more dominant nations in a bold way.
One common theme is the other nations' concern or lack thereof. Since Canada is often overlooked, sometimes the other characters are slow to realize he's sick. Another theme is Canada's own struggle with his illness in solitude. He might be used to taking care of himself and not wanting to bother others.
The Hetalia Canada manga is distinct for its portrayal of Canada's personality and adventures. It has colorful illustrations and manages to capture the essence of Canada in a fictional context. Sometimes, it surprises readers with unexpected plot twists.
One common theme is brotherly love. Since America and Canada are siblings in Hetalia, in these baby - themed fanfictions, they often show a pure form of brotherly affection.
Family is a common theme. Since America and Canada are often depicted as brothers in Hetalia, fanfictions explore their sibling relationship, like how they argue and make up.
She could be brave. Maybe she's not afraid to stand up to bullies in her school or town within the fanfiction world.