What is the name of the main character in The Call of the Wild?

The main character in "The Call of the Wild" is Buck, a large and powerful dog who is part St. Bernard and part Scottish Shepherd. His journey begins in a domesticated setting in California, where he is stolen and sold into the harsh life of an Alaskan sled dog. Throughout the story, Buck undergoes significant transformation as he reverts to his primal instincts and learns to survive in the wild. He embodies themes of survival, instinct, and the struggle between civilization and the natural world. Buck's character development is central to the novel, highlighting his adaptability and resilience in the face of adversity. The other names mentioned, such as Spitz and John, refer to other characters in the story: Spitz is Buck's rival and a dominant sled dog, while John Thornton is one of Buck's human companions and represents kindness in Buck's life. Manuel does not appear in the narrative.