The story in Guardians of the Galaxy Vol 3 is complex. It mainly focuses on Rocket's past. His origin is explored, and we see the cruel experiments he endured. The Guardians set out to save him from his creators. Along the way, they face many challenges and new enemies. They also have some internal struggles within the group. In the end, they manage to rescue Rocket and also find a new path for themselves.
The plot involves the Guardians coming together to stop a powerful villain from getting a dangerous artifact and using it to cause chaos in the galaxy.
Peter Quill is definitely one of the most important. His connection to Ego drives a lot of the story. Also, Rocket is important as his sarcasm and skills are always useful. Gamora too, as she has her own backstory and her relationship with Peter is significant.
One of the main plot points is the discovery of Peter Quill's father. It turns out Ego is his dad, but Ego has a dark side. He wants to use Peter to spread his essence across the galaxy. Another point is the growth of the Guardians as a family. They face challenges together and their relationships develop further.
The main characters include Star - Lord, Gamora, Drax the Destroyer, Rocket Raccoon, and Groot. They are a group of misfits who come together on various adventures in the galaxy.
The main plot points include Rocket's origin. The High Evolutionary's experiments on him are a big part. Then there's the Guardians' mission to save Rocket. Also, Star - Lord's relationship with Gamora is still a factor in the story.