Steampunker

The Steampunker is an NPC. She will only appear if you have beaten The Twins, The Destroyer or Skeletron Prime and you have a house for her. Note: This does not require the world to be in hardmode. If you use a mechanical worm, mechanical eye, or mechanical skull from another world that is in hardmode, beating them will still unlock her.

Items Sold
Once the Steampunker has moved into a house, she will sell the following:

Names
The Steampunker may have any of the following names: Ada, Cornelia, Cynthia, Emeline, Fidelia, Hope, Isabella, Judith, Juvia, Leila, Lilly, Lydia, Minerva, Phoebe, Savannah, Selina, Verity, Vivian, Whitney, Zelda, Zylphia.

Trivia

 * One of her other names Zelda may be a reference to the princess of the game Legend of Zelda.
 * The name Ada, is a reference to Ada Lovelace.
 * The name "Whitney" is a reference to Redigit's wife, Cenx.
 * The term "Air Pirate" may be a reference to the term Sky Pirate,commonly used in the Ivalice world of the Final Fantasy series.

Quotes

 * "I like your... gear. Does it come in brass?"
 * "Be it what it would, a jetpack would suit you nicely!"
 * "Oy, whatchu got in you jiminy fluffer?"
 * "Show me some gears!"
 * "Should I become an air pirate? I've considered becoming an air pirate."

When Cyborg is present:
 * "I'm mighty curious about that fellow. By what manner of consumption does he maintain such locomotion?"

When Pirate is present:
 * That captain fellow seems to me to be 'pretty well over the bay' if you know what I mean!

During a Blood Moon:
 * "I'm feeling a bit peevish as of late, so enough with your palaver you ragamuffin!"