Hello, author, Pighead In, let's take a look at your idea.
Elevator Pitch : Not much to say, looks interesting.
Central Narrative : OK, here's the big cheese. And, I will not lie, the primary concept interests me greatly. I don't know, I always have been a sucker for narratives about traveling, especially interdimensional travels. I always love to see people go on another dimensions, discovering places, meeting people, befriending or becoming "enemies" and all that. So, yeah, I'm pretty interested by that. But there's, for me, two big flaws.
The first is that all the sections involving the Foundation are not appealling at all to me, truly not. In my head, the Foundation will surely not acquiese to her requests because they will not believe a stranger with abilities who can possibly be a threat to them (even if she's not a bad person) and if there was an ability of hers who is "convince immediately everyone that she's friendly", it would be straight-up cliche and a little bit ridiculous. And the second is the format itself, because I really think that making this thing an SCP article could be a great disservice to your story.
And because I don't have anything else to say, well, I will stop here. No greenlight, and it was not easy, because this have a lot of potential. You mention that you want to do Tales and other articles about that. I would suggest you to focus yourself on the Tales. You mention other characters and I would like to see them, not as SCPs but as anomalous beings who travel in the SCP-Verse. All these things are suggestions, feel free to follow them or not!
For the rest, it's all for me, Pighead Out.