France would be a likely candidate. France has always had a sort of motherly - like affection for Canada. He would probably be very eager to take care of baby Canada, dressing him up in cute clothes and feeding him French cuisine, like crepes.
England could also be a possibility. Despite their past differences, England has a sense of responsibility. He would probably make sure baby Canada is well - behaved, teaching him proper manners and reading him classic English children's stories, like 'Alice in Wonderland'.
Japan could also be one to take care of baby Italy. Japan is known for being meticulous and organized. He might be able to handle the practical aspects of taking care of a baby like preparing proper baby food and creating a clean and safe environment for baby Italy.
I think Konan would be the most likely. She has a more gentle and nurturing side compared to most of the other Akatsuki members. She could use her paper abilities to create things for the baby like a soft bed or toys.
Mercy could also be a great caretaker. She has a nurturing side as a healer. She would be able to make sure baby Junkrat is healthy and well - taken care of, using her medical skills to check on him regularly.
Catwoman might also step in. Despite being a sometimes - villain, she has a soft spot for Batman. She could use her cat - like skills to keep baby Batman out of harm's way. And she might find the whole situation rather amusing, but still be very vigilant in protecting him.
England could be one of the main caretakers. Despite their past differences, he would feel a sense of responsibility. Another could be Canada. Since they are related, Canada would surely step in to take care of his baby brother.
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.
His friends would probably take care of him. Midoriya would be very eager to help, using his kind-hearted nature. He would make sure Todoroki is fed and comfortable.
At first, it might be a bit of a one - sided relationship where France is very enthusiastic about baby Canada. France would probably dote on baby Canada, showing him all the wonderful things about France. As baby Canada grows, he might start to become more independent but still have a soft spot for France. He might learn to appreciate France's culture while also asserting his own Canadian identity.
I recall a fanfiction that focuses on the relationship between their guardians and Baby America and Canada. It shows how the two little ones grow up under different influences. The story is filled with both humorous and touching scenes, like when Baby America tries to imitate the grown - ups and Baby Canada is just there being his calm and observant self.
One idea could be France taking on the role of a mentor to baby Canada. He could teach Canada about art, cooking, and the French language. Another plot could involve France trying to protect baby Canada from the chaos of the Hetalia world. Maybe some other countries misunderstand Canada's relationship with France and France has to clear things up.