Exo Stranger
From Destiny 2 Wiki
Exo Stranger is the vendor for Stasis quests.
Location
She can be found near the campsite in Beyond on Europa.
Quests
Stranger offers quests for unlocking Stasis abilities, Aspects and Fragments. Her Fragment quests are random, and grouped by activity in which they can be done. Completing the quest rewards the player with a Memory Fragment, which is used to buy Stasis Fragments. The player can pick up no more than two Fragment quests each week.