A demon exclusive to the CD-ROM² version of SMT1. Can only be obtained by fusing together Missionary, Amaterasu, and Crusader, and is available regardless of the player's level.
Vairocana, also known as Dainichi-Nyorai, presides over the Buddhist temple in Chesed, taking in lost souls and offering them salvation, regardless of their sins or deeds. If Aleph is Chaos-aligned, he will simply tell him to never to attempt justifying the evils he has done and send him on his way. If he is Neutral or Law-aligned however, he will call Aleph a servant of YHVH and attack, only to be killed in turn.
Trivia
In Shin Megami Tensei (CD-ROM²), despite referring to himself as the Tenma race when fused, the status screen lists his race as Tyrant.