Minako Aino (Mina in the US) is at first a very mature character. And as the series goes on, she starts to get a bit dizty. But even though she is ditzy while she is just plain Minako, she gets really serious as Sailor Venus. In many ways you can say that Minako and Usagi are alike. And Minako is more like Usagi than the other senshi.
Before becoming Sailorvenus, Minako was known as Sailor V. You only see Sailor V in the beginning of the US series from posters and video games. Sailor Venus was the last of the inner senshi to appear along with her trusty gaurdian Artemis. Artemis is a white cat that guide Sailorvenus (a lot like Luna and Sailormoon). Since Sailorvenus is the senshi of love, one of her attacks is a chain made of hearts and other are light beams ect. Sailorvenus is a good leader for the other scouts and sometimes takes control.
Personaly, Minako is my favorite inner senshi, so expect more to be added on this page!