Sansa is a non-playable character from original Final Fantasy XIV.
In exchange for teaching ritual dance, the children ask the adventurer to escort Powle and Sansa through the wood to the Lifemend Stump. There, they leave a letter inviting the moogles to appear during the ritual. Upon meeting the group, a man named Hermit of the Wood scolds them that it is a dangerous place for children and accompanies them back to Gridania.
During the Souls Gone Wild quest in version 1.0, the adventurer needed to escort and defend Powle and Sansa to Lifemend Stump. This instance served as a tutorial to introduce the open map to the players that started in Gridania.