One Piece: Boa Hancock (Episode 415)

This is where Hancock tells Luffy her dark troubled past along with Sandersonia and Marigold and why she is all high and mighty on beauty and being an Warlord.

A Certain Scientific Railgun: Mitsuko Kongo

Mitsuko Kongo is the heiress to her fathers 'Kongou Aviation Industry'.  Treated like a princess from birth she's proud, boastful, and sometimes overconfident.  Despite that she's also a very powerful level 4 esper, as well as honorable and loyal to her friends.  She has a pet python named Ekaterina.