Imhiriel asked for drabbles featuring Celeborn interacting with either Lúthien or Aragorn.
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.