That depends on the power levels of each.
Are we talking Izetta by the end of the anime?
Is Tanya at her power level from the end of the LN's or the anime?
Is Tanya convinced Izetta is a messenger of Sonzai Ecks and is determined to slaughter her as a result?
Is Tanya hyped up on praise the lord power?
>Are we talking Izetta by the end of the anime?
Izetta on her last fight with Sophie, because by the end of the anime, she's crippled.
>Is Tanya at her power level from the end of the LN's or the anime?
Tanya from the end of the anime, because I haven't read the LN and don't plan to.
>Is Tanya convinced Izetta is a messenger of Sonzai Ecks and is determined to slaughter her as a result?
>Is Tanya hyped up on praise the lord power?
Sure to both.
The only thing that holds Izetta back are the leylines and that was solved by Sophie's stone.
Tanya is still stuck with WW1 weapons whereas Izetta exists at a WW2 tech and is the equivalent of a nuke, if not more.
>Who wins in a fight to the death?
Izetta. That's because she uses large amounts of plot protection whereas Tanya does not. Izetta's power supply is infinite provided she remains close to a vein while Tanya runs out. However, Tanya is smart and would immediately think of dirty ways to win.
But in a fight where two chars are in the SAME STORY and one char is heavily protected by the author and the other char is less protected by the author, the one that is protected (izetta) will win.
Izetta is built for two things: hot yuri makeouts with Himesama, and killing not-Germans. She's Tanya's natural enemy.
comparing a talented and powerful loli sorceress with the strategic mind of an intelligent and ambitious man from XXI Century with that fanservice shitty lesbian
If Tanya has time to prepare and can gather intel on Izetta, she could very likely come up with a plan to neutralise and defeat her.
If they just happen to fight out of nowhere, and Tanya has no information on Izetta, then Izetta destroys her badly, since she's far more powerful.
In terms of raw power Izetta is a fucking nuke, while Tanya is middling in power unless divine intervention (and even then she maybe scrapes Izy's regular level). Plus Izetta has guys on the ground, the only difference in strategy levels will be adjusting it mid-fight.
tanya, she will end finding a way to not die
>This was the point where Her Majesty, the Archdykess decided to conquer the Izetta´s