In the Diamond Realm, En no Ozuno tasks the Hero with collecting weapons held by two phantoms in his lonesome while Law and Chaos Hero do their own separate, undisclosed tasks. The phantoms are aligned to either Law or Chaos, with their colors being Red and Blue respectively,[a] and if the Hero does share their alignment, they will attack him and drop their weapons when defeated. If the Hero does share their alignment, however, they will transform into unknown figures and willingly give the Hero their weapons; If the Hero is law-aligned, the Red Phantom will turn into a figure wearing a white robe and give him the Light Sword, and if he is chaos-aligned, the Blue Phantom will turn into a shinobi-esque figure and give him the Headsman Ax.
The Red Phantom's sprite if the Hero is law-aligned from Shin Megami Tensei (PlayStation)
Notes
↑In most versions of Shin Megami Tensei, the law-aligned Phatom is Red, while the chaos-aligned Phantom is blue. In the Mega-CD version, however, their colors are swapped.