Artist, NicoNico Douga video creator. Loves the Alice Margatroid/Izayoi Sakuya and the Nishikino Maki/Yazawa Nico.
At least in late-May 2015, it seems their homepage and blog were deleted.
Name: ๆฆๅ ใใใ (Sen'yuu Yuuji) or just ๆฆๅ (Sen'yuu)
Site: ๆฆใใฎ่ป่ทก (Tatakai no Kiseki)
Old site: ๆฆๅใใใๅฅฎ้่จ