Marin Hollow is a villain in Fairy Tail. He is a soldier of the Alvarez Empire.
He appears with Brandish on Caracol Island to eliminate the spy. He captures Erza and Lucy and has the upper hand against Natsu and Gray until Brandish arrives and forces him to free Lucy and Erza and shrinks him.
Later he is forced to paint Brandish's toes. During the invasion he appears besides Brandish on Lucy's bath tub and is locked by Brandish and later taken out by Lucy.
When he sneaks into the Fairy Tail Quarters he tries to kill the captured Brandish, but is defeated again and later imprisoned as well.
Later he is captured by Jacob's magic and freed and a Gemini clone is used to defeat Jacob and he's captured by Fairy Tail again.
It is unknown what happened to him afterwards.