She might react with her usual no - nonsense attitude. McGonagall is known for being strict but fair. So she would first listen carefully to Harry's problem, her eyes fixed on him, and then start to analyze the situation. She may not show much emotion on the surface, but deep down, she's concerned for Harry's well - being.
She might be initially cautious. Given that becoming an Animagus is a complex and dangerous process, she would likely want to ensure Harry fully understands the implications. She could start by asking him why he wants to become one.
She could also provide Harry with some protection. In fanfiction, she might be even more proactive in keeping Harry safe from the dark forces. For example, she could give him a magical charm or a secret spell that only she knows to fend off enemies. Or she could arrange for some trusted allies to keep an eye on Harry when she can't be around.
The main plot could be Harry's journey to become an Animagus with McGonagall's guidance. He might face various challenges like mastering difficult Transfiguration spells and controlling his emotions during the process.
Snape could use his position as a double agent to mislead Voldemort about Harry's whereabouts. McGonagall would be more likely to directly defend Harry. She might gather the other teachers and students at Hogwarts to form a united front against Voldemort. Together, they could create a magical shield around Harry, like the one that protected Hogwarts during the battle, using their combined magical power.
One possibility is that Voldemort could initially be amused by Harry's request. He might toy with Harry, pretending to consider helping while actually having his own evil plans. For example, he could use Harry's vulnerability at that moment to gain some sort of advantage, like getting information about the Order of the Phoenix. Or, Voldemort could see it as an opportunity to corrupt Harry further, slowly turning him to the dark side by making false promises of power and protection.
McGonagall often serves as a mother - like figure in fanfiction. She might comfort Harry when he's facing difficulties with Voldemort or other challenges at Hogwarts. Her influence is seen in how Harry approaches problems. He learns from her to think calmly and use his wits, rather than just relying on his Gryffindor bravado. This helps him make better decisions and grow into a more well - rounded wizard.
She might immediately comfort him. McGonagall is a strict but kind teacher. She could put a hand on his shoulder and say soothing words like 'There, there, Mr. Potter. It will be all right.'
In 'Harry Defends McGonagall' fanfiction, it might show Harry's loyalty and respect for McGonagall. He could defend her against false accusations or unjust treatment. Maybe it's set in a situation where McGonagall is being wrongly blamed for something, and Harry, with his sense of justice, steps up.
Yes, there are likely fanfictions out there with this concept. Fanfiction writers often come up with creative and alternative family relationships for characters. They might explore how Harry's story would be different if he were McGonagall's son, perhaps delving into different character dynamics and plot developments within the magical world of Harry Potter.