Seamstress: Make clothes. Master is Maimu, who is famous not only in the starting town of Kuruburuku, but all over the world. If you make clothes unlike those seen before, you can request rare materials that you may need to assist you on your adventure.
Blacksmith: Master is Barukan, he seems tough but underneath he is kind.
Chef: Master is Kongasu. He's an owner of a 5-star restaurant.
Alchemist: Master is Yaaku. If you work hard, maybe you will be able to create items only possible in legends. Better at battling than you might think.