Mulan starts with her training camp as nothing impressive, but she knows she needs to live the part of her new identity, so she showcases her tenacity and capability to be the best.
Mulan secretly takes her father's place in the Chinese army and ends up being the heroine that saves China. The viewer knows about Mulan's actions before the Emperor does.
Will steps in while Viola and the acting troop practice their scene in a play. Will sees the scene look and feel a certain way - as well as wanting to kiss Viola.