Much like Sarah, Barrett, and Sam, Andreja joins your quest in automatically. Yet if that were all there is to say for her recruitment, we'd never have written this guide. Bethesda Game Studios' RPGs tend to be so sprawling, filled with so much side content, that it's easy to ignore the main quest for dozens upon dozens of hours.
If you're intent on exploring the farthest edges of te cosmos, but want to ensure that Andreja has joined up with Constellation before you do so, then this guide ought to help you know exactly how far into Starfield's main story you need to be before she's willing to team up with you.
Andreja Joins As Part Of The Main Quest
Andreja is the fourth of the 'big four' companions from Constellation in Starfield. That's not to diminish the quality of the game's other companions - OK, actually, you know what, yes, it is. There's lots of great folks to recruit, either to walk around with, or to have help your ship and/or outposts. But Sarah, Barrett, Sam, and Andreja feel like the most fleshed out characters.
Just how long you have to wait before Andreja pops up is another question. The good news is, it isn't terribly long. The bad news is, it's after Barrett and Sam in 'The Empty Nest' quest, which is a long one in its own right. Technically, you'll not need to do all three parts of that before moving on to the quest(s) involving Andreja; we think it's the Barrett stuff that matters most, since we actually got Andreja before finishing up Sam's part.
Into The Unknown
'Into the Unknown' is the next main quest following 'The Empty Nest', and it's got about as many working parts to it, albeit with fewer entirely separate portions. Your goals will be to find the Artifacts on both Piazzi IV-C and Nesoi, afterward he🥃ading to 🤡Procyon III (following some pit stops at the Lodge and the Eye).
If you want to meet Andreja ASAP, start by charting a course to Nesoi, where, after dealing with some foes on the planet's surface, you'll enter a cave where Andreja has been handling some fights of her own. This base includes a slow but steady descent into a very low elevation, so you'll mostly have a nice upper hand against the dozens of Ecliptic mercs you'll be gunning down; that said, it climaxes with a bigger setpiece scenario that largely forces you toward the center.
Take a chance to see Andreja in action while you're down there. Following the big scuffle, go through the narrower corridor and toward the Artifact, at which point you'll deal with another of those quick, strange, visions. Andreja returns to the Lodge, which you should do as well, in order to plug in this Artifact. Speak with her afterward and she will offer to join you, so feel free to take her 🍬along anytime you like.