Who is Royal Emissary for Pottery Wares' Assistant from A Single Shard and what is their importance?

The Royal Emissary for Pottery Wares, a man known as Kim, comes to Ch'ulp'o looking for a potter to give a royal commission to. Kim shows a great deal of interest in Min's work, but would like for it to include the inlay work that Kang has shown. Kim is disappointed when Min cannot show him any work with inlays and returns to Songdo. Later, Tree-ear makes the trip to Songdo to bring Kim some of Min's work but an attack by robbers leave Tree-ear with only a single shard to show Kim. Kim offers Min the commission anyway.