Hotspur is a rival for Shakespeare's Prince Hal in Henry IV, Part 1.
Hotspur is the nickname of Henry Percy, the fiery son of the Earl of Northumberland. Prince Hal is the informal name used for Prince Henry, the eldest son of King Henry IV and the future King Henry V. Shakespeare sets the two young men up as contrasting heirs: Hotspur is already celebrated as a fearless warrior, while Hal spends much of the play in taverns with Falstaff and other companions.
Their rivalry becomes the dramatic centerpiece of the play. Hotspur joins a rebellion against King Henry IV, and the conflict culminates at the Battle of Shrewsbury. Hal defeats Hotspur in single combat, proving that his apparent irresponsibility has concealed the qualities of a future king.
Readers sometimes answer “Henry V,” but that is Hal's later royal title. In this play he is Prince Hal, or Prince Henry of Wales. Historically, Hotspur was considerably older than Prince Henry, but Shakespeare presents them as near peers to sharpen the rivalry.