he should have a certain age and last not least have been at the club for a while and he should be highly respected by his team mates, you will see this in their good relationship screens.
作为合格的队长,他应该有恰当的年龄(不能太小),并且至少要在俱乐部服役了一段时间同时他也需要有领袖风范为其他大部分队友所尊敬,你可以通过查看球员个人的喜欢的球员(goodrelationship)一栏来确定这点。