Here you can find out about each main character's name, age, seiyuu, race, history, appearance, weapons, romance and my opinion of them (for what it counts). You can find out more about some of the stuff (like for weapons you can go to the weapons and attacks section) in other sections which go into more detail.
Inuyasha
Kagome
Shippou
Miroku
Sango
Kikyou
Sesshomaru
Naraku