GUESS WHO (round twelve)

[tsunderes]

I happened to find a little scrap of paper in my desk with something scribbled on it. It seemed to be a clue to the author's identity, but I couldn't figure out who it was, even though they sounded really familiar! If you can figure who the character that wrote this is, I'll give you 3 random cards, but only by 7/14. I mean, after a week, that's just too much effort. But here's what was written on that piece of paper:

"I wield my spear to atone for the eight lives that were lost to save mine."

Last round's mystery person was Nagi from Kannagi.