Crystal Parasite

Someone that grows their entire personality off of the lifestyle or personality of someone who is already famous, or some cultural phenomenon, basically anything popular, in a vain attempt to get famous themselves.
For example, any YouTuber that has over 100k subscribers, or maybe even less.
Sometimes this works, but most of the time they just come off as a parasite, leeching off of the success of the person or TV Show or whatever, the "crystal" they "parasite" off of.
Thus they seem instead like talentless hacks with no worth of their own besides what they echo from their "crystal".
Essentially they are a clone of the person, but worse. Much worse.

Person 1: Ugh, that guy's such a crystal parasite, always leeching off of Merg's success.
"that guy": What's up guys, welcome back, to *insert game that Merg's already played here*.