Fallen Tuba Hero

The fallen Tuba Hero, also known as The Lost, is a boss enemy and Mentor figure that the player can optionally approach while residing in the Northern end of the Brass Kingdom

First Meeting
You first meet the Fallen Tuba Hero inside the Great Orchwood Forest as part of the Violin Legionary Questline when approaching the graveyard. While not able to talk to them, they will bow as a greeting before leaving the area. After this encounter, the player can approach the Fallen Tuba Hero inside the Grand Cathedral in the North upon which they will enter an optional battle with him.