He - and the rest of the court - is clearly shocked at that. "...A mighty accomplishment," he says after a long moment. And then: "I am glad you came through uninjured," he says, then dismisses his court and gestures to a side withdrawing room. "Come, tell me of your journey."

She holds Mygwainor's hand as they go to the side room.

Squeeze.

And she summarizes their adventure to Thingol.

He looks troubled.

As well he should.

"...I was very, very worried, my daughter," he says. 

"You would have stopped me from leaving had I informed you of my intentions."

"Yes," he says, voice tight. "You could have died. Or much worse."

"But that was my choice to make, Father. You cannot swaddle me forever, and nor will I permit it."

"I - "

"Do you understand, what the Enemy could have done to you?"

"No less than what she could have done to my beloved."

"Mortals do not live as long as elves in her captivity."

"That makes her no less worthy of my sacrifice."

She squeezes Luthien's hand. 

And sends to her - "He feels guilty for not coming after you. To help or rescue you, whatever was needed, because he knows what 'could have' happened."

"Sadly, I don't think calling him out on this right now would be productive, but... I can point it out to your mother, maybe. For now, we need to not get me kicked out of Doriath because he's upset."

"The world outside of Doriath's borders is terrible, my Lord," she says, softly, "And growing rapidly worse. You have done something good in making at least this single safe haven - "

"But the Darkness is growing, and the Valar will not come in time for anyone alive in Beleriand. Not now, not for a hundred years. Luthien, ultimately, would not have been any safer if she had stayed in Menegroth's deepest vaults. We all will either come before the Enemy or die before we get the chance."

"And in a world like this, it is safer to have a blade in your hands. To be fierce, and mighty, and not someone the Enemy can risk even trying to capture."

"Your daughter defeated Sauron and shattered his Tower. She stood openly before the Enemy, and cast a spell over the entirety of Angband that, had an army followed us, would have been the end of most of Morgoth's servants. She ensorcelled a Vala. She is only going to grow more powerful."

"Your daughter is the safest person in Middle Earth."

He pauses, almost deflating, the anger and fear in his eyes giving way to a deep grief.

"Please, Father. Trust me."

"I - "

A pause, his gaze going distant. 

"...I will."

"You two have my blessing."

"Thank you, Father."

"You're welcome." He's trying to smile. It's not very convincing, what with how pale his face is. 

Well, it will probably take him some time to compose himself.

"Thank you, my Lord," Mygwainor says with her own smile. "I'll look after her." She squeezes Luthien's hand. 

Squeeze.

He takes a breath, closing his eyes, then - starts trying to get to know his future daughter in law. 

Luthien contributes anecdotes where appropriate.

She mixes stories from their first and most recent lives, keeping the two to a coherent but denser timeline.