Well, Harry's magic is based on spells and the use of a wand. Hades' power is more about controlling the underworld, death, and the souls there. Persephone has power over nature, especially in relation to the underworld. If they were in a situation together, Harry's magic could potentially be used to protect the living from any threats that Hades' underworld - related powers might pose. For example, if some undead creatures escaped the underworld, Harry could use defensive spells.
Percy could have the power to manipulate the coldness that is often associated with the Underworld. He could freeze his opponents or create ice - like structures out of the cold energy. This would be different from his water - based powers in the normal story. Also, he may have a stronger connection to the gems and precious metals that are found in the Underworld, being able to sense them and even use them in some way for his benefit.
Well, Naruto's power of the Sage Mode gives him enhanced perception and strength. In a friendship with Hades, he could use this to help Hades better understand the living world and the threats that might come from there. Hades' power to create and control underworldly creatures could be used by Naruto in battle. For instance, Naruto could summon some of Hades' minions to fight alongside him against powerful ninja enemies. Their powers would be a great combination, with Naruto bringing the energy and versatility of his ninja skills and Hades the otherworldly and often - feared powers of the Underworld.
Often, their powers interact in a way that creates a balance. Hades' ability to manipulate death and the afterlife can be offset by Wonder Woman's life - giving and heroic nature. In some stories, they might even combine their powers to defeat a common enemy. Say, Hades could open portals to different parts of the underworld to trap the enemy while Wonder Woman uses her strength to push the enemy into those portals.
Naruto's powers are mainly based on chakra, which he can use to perform various ninja techniques like the Rasengan or shadow clones. Hades, on the other hand, has power over the dead and the underworld. Their powers could interact in interesting ways. For example, Naruto could use his shadow clones to help Hades manage the souls in the underworld more efficiently. Hades could perhaps use his power to give Naruto a deeper understanding of life and death, which could enhance Naruto's ability to fight opponents who use death - based jutsu.
Her powers could develop through training. Since she has the genes of both Maleficent and Hades, she might start with basic forms of their powers like a small amount of Maleficent's green magic and some control over Hades' fire. As she practices, she becomes more proficient. For example, she could learn to combine the two powers to create a new and unique form of magic.
In a fanfiction where Percy is the son of Hades and Poseidon, his powers would be truly extraordinary. He could have the ability to create portals in water that lead to the Underworld. This would give him an advantage in both battle and travel. His hydrokinesis could be tainted with the essence of death, so when he attacks with water, it could cause a draining effect on his opponents, sapping their life force. Additionally, he might be able to sense the presence of the dead in any water source, which could be used for both reconnaissance and protection.
Naruto, as the son of Hades, would have some really cool powers. His Rasengan could potentially be infused with the power of the Underworld, making it a much more deadly attack. He could also have the power of persuasion over the dead, which means he could make them tell him secrets or do his bidding. His ability to sense chakra in the Naruto world could be translated into sensing the life force or the 'essence' of beings in the Percy Jackson world. This would give him an edge in detecting enemies, whether they are living or undead.
The King of Hell's wife's ending was An Ziyue's death, but a sliver of her soul remained. The King of Hell's brother, the Celestial Thearch, was also dead. Hua Qianxue had become the new Heavenly Emperor, and the mysterious old patriarch of the Phoenix Clan had died. The female lead and Yan 'er died together, but the female lead used the divine artifact in Yan' er's body to resurrect. The female lead and male lead lived happily together and even gave birth to three children.
Her powers would likely cause some students to be afraid of her. Those who don't understand the underworld powers might keep their distance. But some adventurous students might be intrigued and want to be her friend just because she's so different.