Yulin Xu is also known as 徐月鈴, Yulin Shuu (シュウ ユーリン), Witch of the Crossroads, 三叉路の魔女.
Yulin Xu is female.

徐月鈴
Yulin is a Japanese citizen of Chinese descent. She used to be a cracker/hacker that went by the handle "Witch of the Crossroads" (三叉路の魔女).