Ronin's back story could involve some sort of betrayal. He might have been betrayed by someone he trusted, which made him turn his back on his former life. This led him to cross paths with the Guardians of the Galaxy. He may have skills or knowledge that the Guardians find useful, but his past still haunts him. He could be on a journey to find out the truth about his past and those who wronged him.
The key features often include its amazing art style that brings the Guardians to life vividly. The characters are distinct, like Star - Lord with his roguish charm.
Well, in the story, there are a lot of elements. The Guardians start off on their individual quests which gradually bring them together. They discover ancient artifacts and secrets that are being hunted by bad guys. For example, they might find a powerful crystal that could destroy whole star systems if in the wrong hands. And as they journey, they face internal conflicts too, like Star - Lord sometimes butting heads with Drax over different ways to approach a situation. They also visit strange new planets with unique cultures and creatures, all while trying to stay one step ahead of the main antagonist who wants to use these artifacts for evil purposes.
Ronin could have been part of a secret organization in the Marvel Guardians of the Galaxy universe. This organization might have been involved in some shady activities. Ronin, realizing the wrongdoings, broke away from it. However, this made him a target. The Guardians of the Galaxy then became his allies as they were also against the kind of activities the organization was involved in. His back story is thus a tale of escape from a dark past and finding new purpose among the Guardians.