Grawp was a giant who, although standing sixteen feet tall, is short by giant standards. He was Rubeus Hagrid's maternal half-brother
Grawp was rather aggressive, which was a common trait for a giant, and was known to beat up Hagrid when in a bad mood. Hagrid claimed that he didn't know his own strength. Despite being aggressive at times Grawp loved his half brother and when Hagrid was forced to leave Hogwarts, Grawp searched for him and was upset when Hermione was unable to tell him where Hagrid was.