The Veteran

The Veteran would be a Hard Mode NPC that would appear on an expert mode world if you have a suitable home after the Wizard, the Arms Dealer, the Witch Doctor, and the Goblin Tinkerer have all moved in.

The Veteran would sell a number of items including certain Hard Mode weapons and armors. Additionally, he would sell emblems normally dropped from the Wall of Flesh if any emblem (including crafted ones) is held in the inventory at the time, as well as items dropped from mimics. Objects dropped from biome mimics will be sold only after Plantera has been defeated. During a solar eclipse, he will also sell broken hero swords. He will also sell molotov cocktales if the Tavernkeep has moved in, and shiny red balloons if the party girl has moved in.

When threatened, he will attack with the Muramasa.

He would look like the guide, except with the trenchcoat clothing style, with a red mark on the sleeve of his coat, and he would be wearing the worm scarf.

Quotes---

"Really? I've fought monsters twice that size!"

"[arms dealer's name] and I just finished a session of arm wrestling. I won, as usual."

"Are you SURE that was the best method for killing it? Because that's not at all what I would have done."

"Did you remember to burn the remains?"

"I'd ask [dryad's name] out, but she's adamant about dating within her age group and, well..." (If the dryad is present)

"Did you try using a bigger sword?"

(During a blood moon) "Remember when blood moons were a big deal? No? Me neither."

"Yeah, I know how that is. I still have scars from a close encounter."