Raid triggers and the energy line
A lot of the characters on the homepage are Raid faces. The printed line is usually: [Raid] Add this card to your hand, or if you have the required energy, perform Raid with it.
Why lists play four printings of one name
Steps, then the ceiling
Sung Jinwoo, Rei, Saito, and Shin all have cheaper copies and an expensive copy. The cheap ones get you through the early energy. The 7+ cost copy is the raid you actually want to perform. Strategy pages on this site list those printings from the hosted 50, not from memory.
How we pick the picture
Home and hubs
The homepage picture is a 4-cost-or-higher Raid character the list plays. If a 50 plays several raiders, the face is the one with the highest listed-median TCGplayer price in that cluster. The hub still lists every public 50 that plays the name.