Which character is featured in Hamlet's contemplation of "to be or not to be"?

The character featured in Hamlet's contemplation of "to be or not to be" is Hamlet himself. This famous soliloquy occurs in Act 3, Scene 1 of Shakespeare's play, where Hamlet reflects on the nature of existence, life, and death. He grapples with profound questions about the struggles and suffering of life versus the uncertainty of what comes after death. This introspection highlights Hamlet's inner turmoil and philosophical mindset, making it a pivotal moment in the play. The soliloquy illustrates his deep existential crisis and sets the stage for his subsequent actions, showing his complex character development and the themes of mortality and contemplation that permeate the work. The other characters, while significant to the story, do not embody this moment of self-reflection and existential questioning that is uniquely characteristic of Hamlet.