I'm not sure as I haven't read the 'big bag of worries story'. But it could be a person who has the big bag of worries as the main character.
The 'big bag of worries story' is likely about a character who has a big bag full of worries. Maybe it shows how they deal with all those concerns, like learning to face them one by one or finding a way to let go of some. But without reading the actual story, it's hard to be more specific.
The main characters are the boy, who is the narrator, and his grandfather. The grandfather plays a crucial role as he is the one who brings the medicine bag and its associated traditions into the boy's life.
Well, in many'medicine bag stories', there is often a protagonist, perhaps a young person who is on a journey of self - discovery. And there's usually an older figure, like a grandparent or an old shaman. The older figure is the keeper of the medicine bag and its associated knowledge, and through their interaction with the younger character, the story unfolds.
I'm not sure exactly as I don't have the full story in front of me, but typically in a story like this, there would be an older figure who passes on the medicine bag and a younger character who receives it and learns about its significance.
I'm not sure as I haven't read it, but it could be a boy who discovers or owns the bag of marbles. Maybe his friends or family members are also important characters, like his brother who competes with him for the marbles.
It might be that there is a child as one of the main characters. The child could be excited about the bag of oranges, maybe it's a treat for them. And there could also be an older character, perhaps a grandparent who gives the child the bag of oranges and tells stories related to oranges, like how they used to grow them when they were young.
I'm not certain as the details of this story are unknown to me. But it could be a child as they are often associated with cookies and Christmas. Maybe a baker who made the cookies in the white bag could also be a main character.
Since I'm not familiar with the 'A Bag of Marbles Graphic Novel', it's difficult to determine the main characters. However, it might have a protagonist who is on a quest related to the marbles in the bag. There could be side characters such as family members who either support or oppose the protagonist's marble - related activities. And perhaps there are other children in the neighborhood who are either friends or foes in the context of the marble - centered story.
It's possible that there is a group of children as the main characters. Each child could have a distinct personality. One might be the brave leader type who is always eager to take risks when it comes to the marbles. Another could be the more cautious one, who is hesitant but still gets dragged into the adventures related to the bag of marbles. And there could be a creative child who comes up with unique ways to play with the marbles or solve problems that arise because of them.
Since I don't know the exact 'the school bag story', it's hard to say. But it could be a student who owns the school bag as a main character.