In the webcomic and manga, Psykos referred to Blast and Metal Knight as "bishop and rook"
"You cannot enter the game without your bishop and rook"
In chess, the rook is actually worth more than the bishop, because the rook can go vertically and horizontally whereas the bishop is stuck in one color of square although it can move diagonally.
Metal Knight is also stated that "his weapons are stronger than any singular hero"
