Guilty Cross is a technique belonging only to Edgeworth von Karma. It works in different ways.
Effect if Evil-aligned Edit
If the opponent is evil-aligned, then Guilty Cross deals Holy Damage over time. Guilty Cross isn't amplified by bonuses.
Effect if Neutral-aligned Edit
If the opponent is neutral-aligned, then Guilty Cross acts as a Hunter's Mark for Edgeworth. It also makes the target susceptible to Mortal Strike.
Effect if Good-aligned Edit
Guilty Cross has no effect on good-aligned persons, mainly because Edgeworth is lawful good in terms of alignment.