It has two endings. You can go to save Shaundi at the statue, or pursue Killbane and kill him, leading to one last confrontation against STAG as they bring in the flying carrier, the Daedalus.
Yes. On the final mission, you have to choose to pursue Killbane. There will be one more mission after this, STAG Armour is one of the rewards for completing the game that way.
There are two endings to Saints Row 3, one where you choose to rescue Shaundi, leading to the Gangstas in Space mission, another where you chase after Killbane, leading to the Stag Party mission, and one more tiny mission which is just a piece of dialogue. It sounds like you pursued Killbane, meaning the missing mission is Gangstas in Space. If you reload the game, you can redo the last mission and choose the other ending, which will give you 47/47.
They removed them from Saints Row 3. You can only get them in Saints Row 1 and Saints Row 2
Yes, you can be a female in Saints Row 3.
Saints row 3
Saints Row is released
Yes, Saints Row 3 has been released.
Yes you can be a female character on Saints Row 3.
The creators have been saying they have already started on Saints Row 3 so there possibly is a Saints row 3 coming out later on.
You had to pre-order Saints Row: The Third
Yes you can be a female character on Saints Row 3.