上村 ユウカ
from Classmate, Kamimura Yuuka wa Kou Itta.
Yuuka is a lively female student with long, dark hair, and a seemingly odd personality. Her classmate Shuushi considers her the class weirdo, and the rest of the class just ignores her. Yuuka claims to have the power to change the world. Unknown to everyone else, she is keeping a secret that might do just that.
Classmate, Kamimura Yuuka wa Kou Itta.
Shirasaki is incredibly bored by his unchanging daily school life and he ends up falling in with his weird classmate Kamimura Yuuka, who rants about changing the world to his uninterested classmates. However, when she reveals the truth about the nature of their world to him, everything will quickly become stranger than he would ever have expected! (Source: MangaHelpers)
