Because you like Haruko Haruhara in FLCL
After finding a mysterious object in one of the many rooms in her father's mansion, Bulma is inspired to discover its secrets. See them in Dragon Ball.
A vampire hunter, Integra Hellsing doesn't tolerate failure, least of all her own. See them in Hellsing.
Fiercely independent and extremely hot-blooded, Ryuko Matoi prefers to work alone. See them in Kill la Kill.
After several hundred years of shutting himself out from the rest of the world, Japan's not used to dealing with nations, See them in Axis Powers Hetalia.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
Years of being the less desirable Vargas sibling have given Romano quite an inferiority complex, as well as the temper to match. See them in Axis Powers Hetalia.
Given his ability to wrench street signs from the ground, Shizuo Heiwajima is a useful one to have in dangerous Ikekuburo. See them in Durarara!!.
Society may reject Felicia, but this bubbly catwoman just wants to spread happiness to others. See them in Darkstalkers .
Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.
Impassive, overly literal, and a little short on people skills, Angel dedicates her life to enforcing the rules. See them in Angel Beats!.
Ichigo Momomiya is a bubbly student by day, magical cat-powered superhero by night. See them in Tokyo Mew Mew.