An ideal leader needs to be initiative in order to start a group discussions with his or her members, being optimistic(positive) at all things, and having the will to never give up no matter how bad the situation might seem. A leader also needs to be responsible for his or her own personal actions. Listening to what members have to say, recognizing their strengths would greatly help in the communication between a group and to do that, they need a fun-loving leader.
I think that a good leader would share the problem with the group members and analyze the problem with them since different people have different views and the leader's view is not always the best. He or she will also listen to their suggestions to solve the crisis attentively then he or she will "consolidate" all their suggestions and create an accurate solution for the crisis that is occurring.