1) Honesty. Being truthful and honest will inspire people to follow you. Having deceptive behaviour, will not inspire trust in people under your command.
2) Fair-minded. Showing equality among all the people is the way to go. Prejudice will not do well for your cause, and might result in rebellious behaviour.
3) Inspiring. Display confidence in all that you do. By showing endurance in mental, physical, and spiritual stamina, you will inspire others to reach for new heights. Take charge when necessary.
4) Forward-looking. A leader has to have a plan and a vision for the future, a vision that is shared throughout the group. Effective leaders envision what they want and and how they are going to get it. This will increase productivity.
5) Courageous. Have the perseverance to accomplish a goal, regardless of the seemingly insurmountable obstacles. Display a confident calmness when under stress.
A good leader manages a crisis under stressful conditions by first assessing the problem, by finding out what is the problem and why it happened. By doing this, the leader can figure out solutions that are appropriate for handling and solving the matter. Next, the leader has to come up with as many sensible solutions that he can. Compiling all the solutions together, the leader can then prioritize and see which solutions are best for handling and solving the problem. Does it require force? Is that too harsh? Can I do this? These are some of the many questions that should be asked before finally arriving to the solution that will solve the problem.
Resources: (For traits of a leader) http://www.nwlink.com/~donclark/leader/leadchr.html