Remember when you are asking a question like this, these characters are designed by Tite Kubo, the author of the Bleach manga. All the characters that appear in his canon have been created by him to facilitate the telling of his story. Only he can answer questions like; * Why does Ichigo have red hair? * Why does Orihime have large breasts? * Why does Hitsugaya look so young? * Why does Byakuya never smile? * Why is Rangiku's Zanpakutō a cloud of ash? * Why has Yachiru been promoted to Lieutenant? etc