Yes, the Archmage, Infiltrator, Templar and Vindicator are PvP souls and you unlock them in Meridian or Sanctum by spending the currency you earn from participating in Player versus Player activities. These four souls are entirely designed for PvP.
All Characters on Aedraxis - Defiant-side.
Neuroticaine - Level 19 Cleric (Shaman)
Rhayge - Level 10 Warrior (Reaver)
Veyne - Level 10 Mage (Archon)
Sevrys - Level 15 Rogue (Assassin)