Juan

Juan, along with Adam and Paul, are Iron Men on Tutorial Island that can set your account to Ironman mode. He can also give you hardcore ironman armour if you had set your account to Harcore Iron Man mode in Tutorial Island. After the tutorial, he can be found outside Lumbridge Castle, denoted by the map icon on the minimap.

Trivia

 * Juan's name is a play on how "Juan" is pronounced similarly to "one", referencing the one life hardcore ironman players have.