If you're looking for anime similar to Black Rock Shooter Chan, you might like these titles.
Deep in the mountains lies a library with the same name as one of its caretakers, Kokoro. With her sisters Inna and Aruto, she strives to uphold the best characteristic of a librarian -- to help users with all her heart. Join young Kokoro as she starts the journey to become a full-fledged librarian, while learning about life, and being the best she can be.
The story centers on Mira, the clever brains behind an evil organization that invades and destroys everything in its path. One day, a magical girl named Byakuya Mimori decides to stand up to the organization, and Mira falls in love with her at first sight.
Join the king of thieves Jing and his plumed partner Kir as they seek out the greatest treasures in the world - and steal them. From desert bandit fortresses to the innermost sanctums of kings and queens, if there's a magnificent treasure to be had, you can be sure Jing has his eyes (and later his hands) on it.
Chiko, Ana, Miu and Matsuri are back once more for a variety of misadventures. When Miu declares she wants to be an idol and then knocks herself out, she awakens in between the realms of Heaven and Hell with her friends as guides to the underworld. Beyond that the girls deal with prank calls and do their best at independent study, amongst other things. As always, they have plenty of fun in the process!