Okay guys, first of all, even after me telling you guys specifically to not do it you guys still went ahead and gave me ridiculous reasons for your choice like 'She is a milf' or 'She is the best' and so on, so I have decided to not consider those baseless votes, but for those who have really put some thought into it and gave me their views and points on the characters I have only this to say, you guys are awesome.
After reading your points and my own lurking in the wiki of all the poll character's data, I am sufficiently prepared to write a great story in the future.
So, without further delay, here are the poll results.
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Yasaka- 25
Rossweisse- 6
Serafall- 4
Medea -15
Artoria Pendragon -32
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So, the winner is lancer Artoria.
This will most probably be the last poll for this volume as I plan to end volume 2 very soon and begin volume 3, the one I have been very excited to begin since I started to write this story.
See ya.