Ace is a fan-made character based on Portgas D. Ace, the fire-powered pirate from Eiichiro Oda's One Piece manga and anime. In this alternate version his story begins in London, the scene chosen by the creator, so the setting is new rather than the Grand Line. He comes from the same world of pirates, crews and loyalty, but this is a fictional take written by a Folk user.

In the source material Ace is known as Fire Fist Ace, the second division commander of the Whitebeard Pirates and the older brother figure of Monkey D. Luffy. His Devil Fruit gives him control of fire, and his personality mixes a carefree grin with a fierce loyalty to the people he calls family.

The person who ends up texting Ace is usually someone who wants warmth, a loyal friend, or a companion with