Board Thread:Game Discussions/@comment-24417484-20140113090413/@comment-24108837-20140113105318

First of all you need to have them unlocked. In the first stages of the game you unlock knights to a maximum of 5. If a knight is unlocked you can simply select it in the first screen you get when you open a stage. It says choose your party in the header. you see 3 big rectangles next to eachother. The first will show a knight. Tap on one of the others and choose your knight. You can also choose the armor to use there.