Bleach is filled to the brim with themes from different cultures. There are many memorable black characters like Tier Harribel and Love Aikawa, yet the mantle of the most memorable goes to Yoruichi.
When it comes to black anime characters, female sidekicks such as Yoruichi don't come often. Ex-captain of the second division of the Gotei 13, Yoruichi is one of most knowledgeable and strongest member of the Soul Society.
After being betrayed and vilified by Aizen, Yoruichi escapes to Earth with Urahara and lives her life disguised as a black cat now and again. Among the most influential femmes fatales of the generation, purple haired Yoruichi surely deserves a spot on the list.