Since you're using stick figures, you need to make movement as interesting as possible. Just having the character stand there isn't a good idea. A few emotes aren't going to help much. Emotes indicate a mood, but they don't express life.
One thing you could do, though rather tedious, is draw each frame of the stick person while he's standing still. Even though the character's just standing there, all the lines in the frames that make up the stand will be subtly different, adding a more organic feel.
Another thing you can do is give him a wait animation. He'd at least lower his sword and shield while waiting, because those objects have weight--presumably. Also, you could make him look up at whoever is speaking--who I assume are animators.
Even though you're using stick figures, you can still add personality to them. Unless you add personality to your characters, you're not going to make a very interesting animation.
It'd help if you made his walk not so stiff. Even though his legs are just lines, you can bend the lines, and you can animate his walk cycle like any other walk cycle.
Do some research on traditional 2D animation. Even with stick figures, the concepts still apply.