Janremi Blackheart is a non-playable character from Final Fantasy XIV. He's a bandit who appears in the main story.
A chocobo egg has been stolen from Camp Bentbranch Meadows. Luquelot asks an adventurer to find it. The egg thief appears to be a man from Luquelot's homeland of Ishgard, Janremi Blackheart. The adventurer follows the thief's trail to the Tam-Tara Deepcroft, and retrieve the egg from him.
Janremi Blackheart is fought in the solo duty Leia's Legacy during the early Gridanian story. He's a lancer who can use some of the basic skills of lancer class. His spirit can later be fought in the Palace of the Dead in the form of the Ishgardian Pikeman.