King Sammy

King Sammy (born July 29th, 2008) is the main character in the Hippo Story, SMO&W, and My Baby Brother books. He is the leader of the Baby Army and, throughout the series, the main enemy of Trakkis, Plujij, and Tyglo. He has appeared in all the Pretend Woreld books. His best friends are George Aigaigy and Splatter Baby. He has three SamLand accounts, known as SamLand, HappySam, and KingSammy.

Hippo Story
In the first hippo story, Nupip attempts to run off with a small Sammy. Soon, the King's brother Whalee runs out to help and blows his whistle so the annoying Yippy Dogs start chasing Nupip away.