Level Four trader

 are unique settlers that can be recruited to work at your settlements living in various areas across the The Commonwealth in 2281. These settlers, when assigned to specific Level 3 trading posts (emporiums), will upgrade them to Level 4. Doing this provides better items to trade, as well as more caps in your workshop.

Background
In random encounters and in specific locations these eight characters can be recruited with various ways and sent to settlements. Those eight settlers are named and found at :

The Scribe: Random Encounter

Doc Anderson: Random Encounter

Anne Hargraves: WRVR broadcast station

Ron Staples: Vault 81

Vault-Tec rep: Hotel Rexford in Goodneighbor

Rylee: Random Encounter

Holt Combes: Vault 81

Smiling Larry: Random Encounter

It is ALWAYS advisable to assign these settlers to their respected trading posts, as they provide better items and more caps.

The Scribe should be assigned to an Armor Emporium.

Doc Anderson should be assigned to a Surgery Center.

Anne Hargraves should be assigned to a Clothing Emporium.

Ron Staples should be assigned to a Restaurant.

Vault-Tec rep should be assigned to a Trading Emporium.

Rylee should be assigned to a Trading Emporium.

Holt Combes should be assigned to a Trading Emporium.

Smiling Larry should be assigned to a Weapons Emporium.

Appearances
appear only in Fallout 4.