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

Kim, the Royal Emissary for Pottery Wares, travels to Ch'ulp'o looking for a potter to give a royal commission to. He is deeply interested in Min's work, but would like for it to include the inlay work that Kang has shown. When Min cannot show him any inlay work, Kim is disappointed and returns to Songdo. Tree-ear later travels to Songdo in order to show him some of Min's work. Unfortunately, he is attacked by robbers, leaving him with only a single shard to show Kim. Kim offers Min the commission anyway.