While in many cases units were developed pretty much on their own, there were a few occasions where I knew I wanted a theme to match up across a set. This happened especially when pairing sets of Core units together, so they would look consistent when you set up your deck.
The first two (Blink and Blink Hunter) were designed together, and formed the basis of the full FHC faction aesthetic.
It was a tough line to walk to make them 'match' while also being distinct in gameplay, and the Blink Hunter went through a couple of updates to push them further apart.
All three models by Nic Reid
https://www.artstation.com/nicname48/albums/12982160