Level Four trader

Level Four traders are unique settlers that can be recruited to work at your settlements living in various areas across the Commonwealth in 2287. 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.

Encounter locations
The eight settlers are named and found at:
 * The Scribe: random encounter - should be assigned to armor emporium, requires 0 population
 * Doc Anderson: random encounter - should be assigned to surgery center, requires 20 population
 * Anne Hargraves: WRVR broadcast station - should be assigned to clothing emporium, requires 0 population
 * Ron Staples: random encounter - should be assigned to restaurant, requires 20 population
 * Vault-Tec rep: Hotel Rexford in Goodneighbor - should be assigned to trading emporium, requires 0 population
 * Trader Rylee: random encounter - should be assigned to trading emporium, requires 10 population
 * Tina De Luca: Vault 81 - should be assigned to trading emporium, requires 0 population
 * Smiling Larry: random encounter - should be assigned to weapons emporium, requires 30 population

Appearances
Level Four traders appear only in Fallout 4.