This alien Starfleet official was played by Jeff Bezos in a cameo role. In the words of Star Trek Beyond Director Justin Lin, Bezos "dropped in" to play the role.  He greatly enjoyed the experience, although the extensive make-up he wore for the part required him to drink through a straw. 
It is possible this girl was meant to be the alternate reality counterpart to Demora Sulu, but John Cho did not think she was, and did not remember if the character had been given a name on set.  In an Entertainment Tonight interview with John Cho, Cho claimed that the photo seen on his console was taken out of a picture frame from Walgreens.