Tengen Toppa Gurren Lagann (天元突破グレンラガン)
Character designer Atsushi Nishigori’s (錦織敦史) concept art and prototype designs of Yoko Littner were showcased in the Tokimeki ✩ Yoko Book, which came in the Tengen Toppa Gurren Lagann Kirameki ✩ Yoko Box (Amazon US).