Nero Bride

September, 3rd Nerofest, be careful about the day you roll, as she shares a rate up with Brynhildr, other limited servant.

Also, you can calc your chances of getting her with all your savings here, just for curiosity: https://shipfu.moe/fgo/

If we get the Fate CCC pre-launch campaign she'll actually have a rate up banner with Gil (on separate days during the banner) around late April/Early May