Ikaro

Ikaro was a ronin who became tainted.

Guest of the Lair
Ikaro stumbled across a remote and secretive valley known as the Lair, ruled by the third Jomei since the plateau was cut off from the Emerald Empire in the early 6th century by the original Heichi Jomei. Ikaro became a permanent guest of the valley, because no one could leave it to keep the secret of the last Boar remnants.

Death
During a particularly brutal winter Ikaro's secret was exposed, and with his superhuman powers he slew dozens of Boar samurai who sought to arrest him. When the cursed samurai finally fell, the Jomei ordered that henceforth all Tainted samurai in the Lair would immediately cleanse their shame with seppuku or face execution.