Selecting team leaders

[Sconrad]

I am one of the two co-captains for team 122 this year. Unfortunately, the other co-captain has had several unexpected time commitments and cannot continue in her role as co-captain. We were selected by the mentors on our team. Today, the lead mentor on our team, Mrs. T, approached me and told me that she wanted me to make the decision as to who would be the next co-captain with me . We hail from a two-year career and technical education school, so our seniors are only in their second year on the team, including me. This makes it difficult for me to come up with candidates because a lot of the students are new or new last year. I have a couple of kids on the team that come to mind for the position and wanted to know: What are some key traits in a FIRST team student leader (or any leader for that matter) that you guys look for when evaluating leadership ability?

Thanks!