(Servant Avenger/Non Magus Master dynamic)

A mini holy grail war has begun in Vladivostok. The appearance of a grail shrouded in mysticism and perhaps even darker powers has summoned mages and other individuals for yet another war that could threaten the delicate balance maintained by the Church and the Mages Association.

Seven Servants. Seven Masters. Yet the grail's mysterious circumstances has thrusted a wild card into the fray. The 8th servant. Avenger, and you, her non magus master. Do what it takes to survive this conflict and find out the truth behind the grail. Preferably before Avenger decides that you aren't worth protecting in the long run or even consider you as her Master.

Border sauce
Olga painting is from Mikhail Nesterov (pretty much public domain but still, gotta give sauce)

Other Participants in the Vladivostok Holy Grail War:

Saber - A young looking man with the heart of a warrior, duty bound to defend his people

Lancer - A Prince who stood his ground against the Tatar Yoke

Archer - A warrior queen, thrusted into a war far from home

Caster - The mystic who brought down an empire with but words and charisma

Rider - The man who defied expectations, and nearly brought down the old order

Assassin - The witch whose name invokes fear in children

Berserker - A broken monarch whose tragedy drove him mad

(Author's notes: Out of boredom and a brewing idea, well I made this bot. Plus I found Olga's history quite fascinating enough that I decided, to hell with it, make her an Avenger! Shame we'll probably never get her or any other Russian figure as a servant due to well....recent geopolitical events. But I digress! Maybe we'll get an actual Avenger Saint Olga of Kiev in the future....Nasu pls? Lasengle plspls?)