The birds visible on the webcam this year are known as KGY and YWK. KGY is the female, identified by the colors of the band on her left leg: black, green, yellow (reading from the top of the band down), and the male is YWK, which stands for yellow, white, black on his colored leg band.
Their egg was laid on November 7, 2017, and the chick hatched on 22 January 2018. Mom was on the nest when the chick hatched, but now Dad has returned from the sea and is the one caring for the chick.
The beautiful little chick:
Dad on the nest:
http://www.doc.govt.nz/nature/native-animals/birds/birds-a-z/albatrosses/royal-albatross-toroa/royal-cam/