The Walter boys themselves are surely important characters. There are likely to be a number of them, each with their own personalities. And of course, the main character who has to live with them is important. Maybe there's a parental figure in the Walter family as well, like a mother or father who plays a role in guiding the family and interacting with the new addition to the household.
The girl who enters the Walter family's life is central. She has to navigate her new life among the Walter boys. There's probably an eldest Walter boy who might be more responsible and a younger, more mischievous one. And there could be a middle - aged Walter boy who is in between in terms of personality traits, like being more of a mediator in family situations.
Well, clearly the Walter boys are main characters. There might be different personalities among them, some could be more outgoing, while others more reserved. And then there's the character who is living with them, whose perspective the story is likely told from.
In this novel, the main character is surely interesting. She is in a whole new world with the Walter boys. She has to face new challenges and form new relationships. Among the Walter boys, there might be a character who is really charming and stands out. Maybe he's the eldest and has a lot of responsibilities. Or there could be a younger one who is really mischievous and adds a lot of fun to the story. And don't forget the mother in the Walter family. She might be very warm - hearted and play an important role in making the protagonist feel at home.
The 'Walter Boys story' might be about a family named Walter. It could involve their daily lives, relationships, and the various adventures or challenges they face. Without more specific information, it's hard to say exactly, but it likely centers around the Walter boys in some way.