Athena could be his mother. Athena is the goddess of wisdom, and Draco, despite his flaws, is shown to be cunning and strategic. His Slytherin nature of being sly and calculating could be attributed to Athena's influence. Also, Athena is associated with owls, and in the wizarding world, owls are important for communication. Draco's connection to owls (through the use of them for mail) could be a subtle link to Athena in this fanfiction.
Apollo could be a likely candidate. Apollo is associated with beauty, intelligence, and archery. Draco is often described as having a certain grace and he is also quite intelligent in his own way. His ability to aim spells accurately could be seen as an echo of Apollo's archery skills.
Poseidon might be his father. Draco has a certain coolness and aloofness about him, much like the vast and often unknowable depths of the sea which Poseidon rules. Also, Poseidon's power over water could potentially manifest in Draco in some way, like an ability to control water - based magic more effectively. And if there were any underwater magical situations, Draco could have an advantage because of his possible Poseidon - related heritage.
One possibility could be Hephaestus. Given Tony's talent for building and creating advanced technology, it would make sense for Hephaestus, the god of blacksmiths and craftsmen, to be his father.
Well, his wizarding abilities like spell - casting could be enhanced by his demigod powers. For example, if he has the strength of a certain Greek god, it might make his hexes more powerful. His demigod speed could also help him dodge spells more easily in a wizarding duel.
Apollo could be a likely candidate. Apollo is the god of music, prophecy, and healing. Naruto's strong sense of justice and his ability to inspire others could be seen as traits inherited from Apollo. Also, Naruto has a certain charm that could be related to Apollo's association with the arts. And if Naruto had some healing abilities from Apollo on top of his own ninja skills, it would make him even more of a valuable asset in battles.
In this fanfiction, the plot might be centered around Tony's journey of self - discovery as a Greek demigod. He could start having strange dreams or visions related to Greek mythology. As he investigates, he realizes his true heritage. Along the way, he might have to choose between his life as a superhero in the public eye and his new life as a demigod, which has its own set of rules and responsibilities that he has to learn and abide by.
Well, Draco could be a son of a Roman god like Mercury. His slytherin traits of cunning and ambition could be seen as gifts from the god. Maybe his family's pure - blood mania in the HP world could be translated into a sense of superiority due to his divine heritage in the demigod world.
If Draco Malfoy is a demigod in fanfiction, his character traits would change significantly. His loyalty, which was somewhat wavering in the original series, could become more steadfast. Maybe his demigod nature makes him feel a stronger connection to a certain group or cause. Also, his arrogance could be dialed up to eleven as he might believe he has the right to rule or lead because of his divine blood.
Maybe he has the power of elemental control. Given his Slytherin nature, water or air control would be fitting. He could use water to create barriers or air to send messages or eavesdrop on conversations. This would add a new dimension to his sneaky and resourceful character.
I think he would most identify with Prometheus. Prometheus was a rebel who stole fire from the gods and gave it to humanity, which was a great act of defiance but also a way to empower people. Tony Stark often goes against the status quo. He shares technology with the world through Stark Industries and is always looking for ways to improve and empower humanity, much like Prometheus did with fire.
Well, he might incorporate Greek god - like features into his suits. For example, he could model the strength of the Hulkbuster after Hercules. Maybe add some sort of flight ability inspired by Hermes' speed. It could also be that he uses the concept of the gods' immortality to develop self - healing mechanisms in his tech.
He might have the power of persuasion if he was related to a god like Mercury. Since he was quite good at manipulating situations in the Harry Potter series, this power would fit him well.