Tuba Merchant

The Tuba Merchant is one of the first people the player will encounter on their journey. He sells low tier items at a low price, making him a very valuable asset during the start of the player's journey. He betters his assortment of weapons and tools throughout the game and remains very helpful due to that. He doesn't care about the ongoing war with the other instrument kingdoms, and states that he will sell to anyone as long as he can make money out of it.. His only goal is to make money which sometimes goes before his morals, however he is shown to assist the party in dangerous situations and give a helping hand to those in need, though usually for a price.

He is a part of the old Orchestra, after being a very renowned Tuba Knight his days quickly wore on him, and he decided to instead become a neutral merchant. He will sometimes fight along side your team, supporting them with various healing items/stat boosters but never actively engages in the fighting itself.

The only exception to this is when he takes the role of a key ally in the Tuba Trio Bossfight, making the fight possible to win due to the passive effect of reducing the defensive stats of his former friends and allies of the old Orchestra. In the fight, the Merchant reveals himself to be quite sympathetic to your cause, however states that this is only due to the fact that "He wouldn't be able to sell his goods any longer if the world ended here."

Tubas News Network
In one of the Easter Eggs of the TNN, a viewer asks the host of the TNN Talkshow, if he isn't just the Tuba Wizard in disguise. The Tuba Merchant answered that he heard this many times before, however states that he is merely the Wizard's Twin Brother.

Q: Isn't he the tuba wizard?

A: No, however we are often confused for each other. He is merely my Twin Brother, you see. No hard feelings.