WN/Virtue Series

Virtue Series Ultimate Skills are a skill that are based around the seven virtues. Although their definition is not as clear as the Seven Deadly Sins, the author seems to be using words analogous to both the Four Cardinal Virtues and Three Theological Virtues, and also from the second set of Seven Heavenly Virtues that are meant to oppose the Seven Deadly Sins.

The Virtue Series of Ultimate Skills are a subset of a broader series called Angel Series. Michael has the ability to completely dominate over anyone with a Virtue Series Ultimate Skill, which was how Manas: Lucia was able to control Dino's (who had Fallen King Luciel) actions in favor of Manas: Velda even if he knew that Velda wasn't actually Veldanava. The only reason he was later able to break free was that he also had Slothful King Belphegor, which is a Sin Series, or Demon Series, Ultimate Skill.