BLEACH THE MOVIE: MEMORIES OF NOBODY

In Karakura Town, there has been a sudden outbreak of unidentifiable spirits called "blanks" (vacant souls) while in the skies of Soul Society, the real world has been reflected. A mysterious female shinigami called Senna has appeared before Ichigo along with a man named Ganryu, leading a group called the "Dark Ones." (Source: Anime News Network) — Description from AniList community (anilist.co).