The Initiative only thought Habitat-7 was devoid of sentient life.
Driven underground when nature turned against them, the Crepusca have remained hidden for over a century. Three or so months after the Pathfinder first visited the world, the Gatherers who took the risky trips to the surface for supplies came back, excited and shouting the news that the world was returning to normal. The skies were clear and breathable, and life was returning to the planet; soon, they wouldn't need the filtering system to have breathable air.
Natalie is still her people's Archivist, leading them as best she can given their circumstances. She's a little more hardened in this verse, used to the harshness of living underground and on dwindling supplies. She's not unkind, but she's not as warm and fuzzy. Natalie acts as both Archivist and ambassador for her people to the Initiative, and is happy to make nice with the newcomers. She feels like their people are indebted to them for their assistance and is willing to let a few things slide. She only hopes that the debt owed does not cost them dearly.