Olga Irivika is one of the main female protagonists of High School Ankoku who appears as Sveta's partner during the 2nd Arc: Awakening of the Prince of Darkness. She’s an exorcist of the Eastern Orthodox Church and the wielder of the Holy Sword, Dyrnwyn.
Olga is a beautiful young woman with has long blonde hair and ties it to the side of her head with a black ribbon. She has crimson eyes.
Her battle attire is her Church battle suit, which consists of a black, skin-tight, short sleeved unitard with pauldrons, matching fingerless gloves that extend to her biceps, and thigh-high boots, all of which are adorned with straps. This attire is worn under a white hooded cloak with gold and blue accents. She also wears a crucifix around her neck.
Upon transferring to Mafteah Shelomoh Academy and joining the Supernatural Investigation Club, she wears that Mafteah Shelomoh Academy girl’s uniform.
Not much is known about Olga's history other then that she joined the Eastern Orthodox Church at some point in time.
Excalibur Blessing : also known as the Holy Sword of Blessing, is a sword that relates to one's belief in the teaching of the religion, and it has been said that it mainly shows its effects when you use it during the holy rituals. For example, it can do things like weaken Devils and Vampires during an exorcism, strengthen an exorcist’s power, as well as give blessing to those who are participating in the mass. She left it behind at the end of Volume 3.
Dyrnwyn : Olga's Holy Sword. Dyrnwyn is a powerful Holy Sword and one of the most difficult to find wielders for. The sword can set ablaze at the will of its user.