Nebula and Thor
Her face was actually her own, minus the blue skin, the black eyes and the augmentations. It was part of the spell she'd requested from Loki, a chance to look somewhat like she might had parts of her not been changed by Thanos. That didn't make her immediately identifiable.
Nebula turned, recognizing the voice and managing a genuine smile for the groom. Interesting that her choice of attire had provided a moment of memory for him, associated with family and a place that no longer existed.
"I'm glad you like it, Thor. Hope helped me choose this dress, as it is very close in colour to my natural skin tone."