I'm not sure specifically as I haven't read it. But it could be a young girl who is drawn to the sea and the sea glass she finds there.
Perhaps there is an older, wiser character who serves as a guide or mentor to the more troubled main character. This type of character is common in novels and could play an important role in helping the main character deal with their 'heart of glass' - like state.
I'm not sure specifically as I haven't read this exact 'the glass house novel'. But generally, there could be a protagonist who is likely to be the center of the story, perhaps someone who is new to the glass house or has a special connection to it.
Jeannette Walls is central. She tells the story of her family. Rex Walls, her father, who has big plans but fails to fulfill most of them. Rose Mary Walls, the mother, is a free - spirit. And the siblings play important roles too. Lori is the eldest sister, Brian is the brother, and Maureen is the youngest sister. They all experience the family's ups and downs together.
I don't know as I haven't read the book. But it could be about a group of boys, perhaps friends or brothers. Maybe there's a central boy who is the main focus, and the others are there to support or contrast his character.
Celaena Sardothien is the central character. There is also Dorian Havilliard, a prince in the story, and Chaol Westfall, a captain. These characters play important roles in Celaena's life and the overall plot.
I don't know the main characters in this novel as there isn't enough information given about it.
I'm not sure specifically as I haven't read the 'Heart of Glass Novel' in detail. But usually, there could be a protagonist who drives the story forward. It might be a young person, perhaps a girl, who is at the center of the events in the novel.
I don't know as I haven't read it, so I can't tell you who the main characters are.
I don't know who the author of 'the sea of glass science fiction novel' is. There are so many science fiction novels out there, and without more information, it's difficult to determine the author.
I don't know as I haven't read it. But typically in a graphic novel like this, there could be a brave warrior as a main character who wields the sword of glass.