I have to disagree with the above comment, Fate isn't so much a yandere as she is genre savvy and over protective. she knows full well that if Nanoha finds out there are people who need help she will jump in head first with no regard to the damage it could do to her and she is still recovering from a serious injury. so while she may over react while being protective she is fairly justified in her behavior.
FanficRecs disagreement
I have to disagree with the above comment, Fate isn't so much a yandere as she is genre savvy and over protective. she knows full well that if Nanoha finds out there are people who need help she will jump in head first with no regard to the damage it could do to her and she is still recovering from a serious injury. so while she may over react while being protective she is fairly justified in her behavior.