"Fath—?"
"Loki!" she exclaims, and fairly leaps across the room to scoop her sister right off the ground into an enthusiastic hug. "What happened? We thought you were dead - I thought you were dead—!"
Loki slides her hand down the staff so she's not crackling any more just in time to be hugged. "I was shunted into another universe and got stuck there!" Hug. "And had a fantastic adventure."
Squeeze. "I missed you too. I'll tell you everything, of course."
"I got out of the universe on my own," Loki says, "but then I had to go kill an evil god, so yes, that's the Tesseract. I think I might keep it."
She splutters to a halt, un-hugs Loki, and stands back with her hands still on Loki's shoulders as though afraid that she will vanish again the moment Thor is not personally holding her.
"I think," she says, "you had better start from the beginning."
"I will be happy to. I'd like to tell Sigyn the story too, do you think the Three will be very alarmed if he should disappear abruptly before their eyes?"
"Then I suppose he'll have to walk." Thumb to Tesseract. The crackling energy is where she wants it and that does not include it interfering with Thor in any way despite the hands on the shoulders. "Hey Sigyn, c'mere."
Thor flinches slightly from the crackle, but not even the threat of the Tesseract's wrath is enough to get her to let go of her sister right now.
Sigyn overheard the summons, of course, and makes his way to Frigg's weaving room with all unobtrusive speed.
"Storytime. - D'you suppose Mother should be here too?" Loki asks Frigg.
And now the room is dim and the visual aids are here in the middle of the circle they make, bright and crisp. It's a map of the stupid cylindrical planet. "This is Arda. And this -" Zoom. "Is the Helcaraxë, where I landed quite unexpectedly having expected to appear accompanied on Midgard and not alone on an ice continent. Fortunately, though..."
And she goes through the rest of the story absolutely shameless with the illusions to add depth and display faces and landscapes. Quendi and their rivalries. The Enemy, Angband. The full extent of her sorcery and how she learned it.
She hesitates only a little when she eidetically illustrates her fight with the first Balrog.
Thor is hesitant about the illusions for about two seconds before she starts getting into the story, laughing at the funny parts, looking deeply sympathetic about the maudlin gay elves, clapping delightedly when Loki fights something.
Loki was not looking at herself closely enough at the time to know when she turned blue, but she guesses; her voice goes hushed as the illusion bleeds into cooler colors except for red, red eyes, the narrative and the illusion are both oblivious until the Balrog explodes -
"- and that's when I noticed I'd turned blue."
"No, I don't know why I'm so short either. That's what you were thinking, right?"
"I - I don't know what I'm thinking," says Thor. "...Besides that the bards should sing of that battle for centuries to come. Well fought, sister."