Colon

Colon is a giant child living on the island of Elbaf, the land of giants. He is the half-human half-giant son of Scopper Gaban and Ripley. Despite his appearance, he is actually 20 years old, but is physically 6-7 years old as giants grow three times slower than humans. Colon holds admiration for strong pirates, including Shanks, the Giant Warrior Pirates, and Luffy. He is known as a delinquent among the other giant schoolchildren, and appears quite violent compared to their more recent peaceful upbringing. He requested to join the red-haired pirates when they were staying on Elbaf, but was turned down by their captain, Shanks.

(Source: One Piece Wiki)