Nier (brother) is a teenage boy left to watch over his only sister following his mother's untimely demise some years ago. He loves his sister deeply and strives each day to provide for her as best he can. He is also a skilled fighter trained in the ways of the one-handed sword. Over time, he comes to possess a mastery of the spear and two-handed sword as well. These skills, and many more, come in handy as Nier dedicates himself to finding a cure for his sister's illness.