Well, it's hard to say for sure. Sometimes stories draw inspiration from real life but have fictional elements added. Maybe you need to look into the author's notes or background information to get a better idea.
In the 'Lob's Girl' short story, the main characters are, without a doubt, the girl and Lob. The girl is a central figure as we follow her experiences with Lob. She could be a young girl with a kind heart who is open to having a relationship with a dog. Lob, on the other hand, is the furry protagonist. He is likely to be a loyal, friendly dog who brings a lot of love and adventure into the girl's life. Their different natures, one human and one canine, interact in a way that makes for an interesting and heartwarming story.
Well, 'Lob's Girl' is a story that centers around a special connection between a girl and a dog. Lob, the dog, is always by the girl's side. There are events that test their relationship, like when Lob might get lost or face some difficulties, but through it all, their bond remains strong. It also shows how the girl and Lob interact with the people around them, and how their relationship affects those in the community.
In the 'Lob's Girl' full story, the two main characters are the girl, who is at the center of the story, and Lob, her dog. The girl is the one with whom Lob forms a deep connection, and they are the focus of all the events and interactions in the story.
A new antagonist could be a cruel dog catcher. He might think Lob is a stray dog and try to catch him. Sandy would then have to fight against this dog catcher to protect Lob. This would create a new conflict in the story.
One possible plot development could be that Lob somehow gets lost again. Maybe he chases after a strange animal into the woods and Sandy has to go on a new adventure to find him. This would bring back the element of suspense and adventure that was in the original story.