Zodiac Stones

(FFT Part 46) These auracite stones seems to have more to them than I gave credit for. It seems these stones simply amplify the personality and consciousness of the wielder. Cardinal Delacroix was a power-hungry murderer and became Cuchulainn, whereas Wiegraf was a pathetic idiot who strived for strength, so he became Belias. It weirdly makes sense because each got what they both wanted in a way satisfying to either person. The Cardinal became so powerful that it literally consumed himself and Wiegraf became so wise that he forgot that a squad of badasses was right in front of him.

Yet Marach being of mostly good character, if you excuse his screwed up early upbringing, was saved by the stone and his personality largely unaffected by the magick contained within the stone. It seems good people, like Marach and Rafa, can use the stones' power for good, it's just that a bunch of evil characters have many of the 12 stones with them literally in their possession.