1. Ron Weasley and Hermione Granger: Harry Potter's best friends, Ron and Hermione, are his constant companions and provide unwavering support throughout the story. They stand by Harry's side, even in the face of grave danger.
2. Albus Dumbledore: Although physically absent, Albus Dumbledore continues to guide Harry from beyond the grave through his previous instructions, memories, and the wisdom he imparted during his life.
3. Luna Lovegood, Neville Longbottom, and Ginny Weasley: These three fellow Hogwarts students played crucial roles in the Battle of Hogwarts by leading the resistance against Voldemort and his Death Eaters. Luna provided valuable information, Neville helped destroy a Horcrux, and Ginny joined forces with Harry to fight in the final battle.
4. The Order of the Phoenix: This secret society, originally formed by Dumbledore, works to fight against Voldemort and Death Eaters. Members like Sirius Black, Mad-Eye Moody, Remus Lupin, Nymphadora Tonks, and Aberforth Dumbledore offer both physical and emotional support to Harry at crucial moments.
5. Sirius Black: While Sirius Black sacrificed his life in the previous book, he continues to support Harry through visions and flashbacks that provide comfort and guidance during difficult times.
6. Severus Snape: Although Snape's loyalties are initially unclear, it is eventually revealed that he has been working in secret to protect Harry and ensure Voldemort's downfall. His sacrifice and the revelation of his true intentions play a crucial role in shaping Harry's destiny.
These characters, as well as many others, helped Harry Potter in various ways throughout "Harry Potter and the Deathly Hallows", forming alliances and working together to ultimately defeat Lord Voldemort.