Use the Trilogy Save Editor to import Nikita's face to your Shepard.
ME1 and 2 share one file and 3 has it's own.

List of mods you will need if you want her to look exactly like in the pictures:

Alternate Ellise Default FemShep Retexture
HD Eyes
More Hair for Femshep (ME3LE)
More Hair for Femshep (ME2LE)
More Hair for Femshep (ME1LE)
MELE2 brows and facial hair transparency fix

Without the Hairmod she might be bald, or worse XD