The Essential Qualities:
Problem-solving abilities: We're referring to the analytical side of problem-solving; the whole consulting profession is built on the assumption that consultants can break down business issues more effectively than anybody else.
Leadership potential: It's never simple persuading a group of experienced individuals (your customers) to do something they wouldn't want to do; moreover, consultants often operate in groups. Keep in mind that "leadership" refers to the ability to influence others, not to being elected as the class monitor.
Achieving mentality: Problems are usually enormous and challenging, and deadlines are tight; don't even consider work-life balance here; you have to go all-in. People who refuse to put in that kind of effort are never fired from the business because they never get in!
The Must-Have List (but not always required):
Although business experience is not required for potential consultants, it is necessary for outstanding performance in case interviews. Fortunately, it is something that can be learned, because the majority of topics utilised in consultant interviews are basic to intermediate. Technical abilities are essential for specialised roles at McKinsey Digital, for example. McKinsey will tell you exactly what sort of skills or technical knowledge will be examined, so don't be concerned.
Here's a video describing what interviewers look for in consulting interviews: