Rubeus Hagrid is a fictional character from the Harry Potter series, created by author J.K. Rowling. He serves as the Keeper of Keys and Grounds at Hogwarts School of Witchcraft and Wizardry and is known for his large stature and kind heart. Hagrid is half-giant, which contributes to his impressive size and strength, and he has a deep love for magical creatures. Hagrid plays a significant role in the series as a friend and protector of Harry Potter and his friends. He introduces Harry to the wizarding world and often provides guidance and support throughout their adventures. Hagrid's character embodies loyalty and compassion, making him a beloved figure among fans.