They only suppress it in the courting phase also known as love bombing. Once they have their subjects invested they show their unmasked face. Narcissists also suppres or wear a maks to the outside world and oftentimes they project an image of dependable and likeable people. Think of policians and what they say or the image they build to garner votes vis a vis of what they actially do, their actions, which don’t correspond with their projected image.