One possible theme could be friendship. Sam might make friends with other animals in the story, showing that different species can get along. For example, he could befriend a bird and they help each other out.
Love could also be a theme. Sam could be in love with someone and the story could revolve around their relationship, the joys and sorrows of it. Another theme might be self - growth. Sam may start as a naive character and through different experiences in the story, he grows and becomes a more mature person. This could involve facing fears, making tough decisions, and learning from mistakes.
Well, 'Sam the Cat' might be a really cute story. Maybe Sam is an adventurous cat who gets into all sorts of mischief around the neighborhood. He could be chasing mice, climbing trees, or befriending other animals.
One possible theme could be friendship. The little cat might make friends with other animals in the story.
Adventure is also a big theme. Many fanfictions send them on wild adventures, like exploring a haunted house or going on a treasure hunt. This allows for a lot of action and excitement in the stories.
One possible theme could be mystery. Since black cats are often associated with mystery, the story might revolve around some unexplained events in Riga that the black cat is connected to.
One possible theme could be friendship. If Toby has other animal friends or a close relationship with his owner, that shows friendship. Another theme might be adaptation. If Toby is a stray cat who adapts to a new home environment, that's an important theme.
One possible theme could be transformation. The person changes from not being a cat person to loving and caring for a cat. Another theme could be companionship, as the cat becomes a new friend in the person's life.
One possible theme could be mystery. Since black cats are often associated with mystery, in the Ginza Black Cat Story, the cat might be involved in some mysterious events or be a symbol of mystery in the Ginza area.
One possible theme could be redemption. If Sam had made some mistakes in the past and is now back, the story might be about his chance to make things right.
One theme is loneliness. The wife seems lonely in her relationship and in the hotel environment, and her concern for the cat might be a way to fill that void.