Like most end game companions, Ensign Raina Temple's customization's are not found in low level zones but I have found them all and taken screenshots and tails to make it a breeze for you to choose the look you like most. If you wait until you have reached level 50 to purchase her customization's you will find that you have already got used to the way she looks by default. This guide will give you an idea about her personality and show you where to purchase the options so you can go get the one you want as soon as she joins you at around level 40. Even though her customization's are found in the level 50 zone, you are able to safely get there with no risk
Ensign Raina Temple is the 4th Imperial Agent Companion and I have found her to be my companion of choice at level 50 on my Operative. She uses the same gear as my agent so it's easy to deck her out. She is also easy on the eyes and she doesn't have an annoying voice.