User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-28209369-20170802025757/@comment-28209369-20170803114126

Ding ding ding! Correct! She is the Noble Lady Warrior of Suontaka! And you even got why she swears to "not lose to her Noble Phantasm again"~

https://rautaportti.fi/swords/one-handed_swords/suontaka_viking_sword

That there is one source I took some inspirations from regarding her King trait. While the sword has been given many names, I've chosen the finnish name "Suontaan Loistomiekka" to be the true name of her Noble Phantasm. Not only because of her origins, but because in true finnish fashion, it holds multiple meanings and could be translated as "Superb Sword of Suontaka", "Deluxe Sword of Suontaka" or even "Gleaming Sword of Suontaka".

I have taken some liberties in creating her a legend fitting to her apparent status, which however has been lost to history, being from a time with little to no recordings. Thus, her Information Erasure EX acts more like a curse, making any events she is a part of forgotten forever.