Imhiriel asked for drabbles featuring Celeborn interacting with either Lúthien or Aragorn.
He remembers how she danced—swift as rain, slow as sleep, flowing like a river. Lúthien would dance the stars down ere ever day dawned, and he'd thought her most beautiful in those moments.
He was wrong. True beauty lay hidden 'til that unexpected other arrived, but he saw it clear the day she stood with Beren before her father, Angband's horror a shadow upon them.
Celeborn understood then: love makes shine true beauty, which may not be denied—not even by death. Seeing his granddaughter radiant in Aragorn's arms, he sees her again, Lúthien, and knows her legacy lives.