How would you answer?Watch
But the general sort of qualities all unis look for is the potential to suceed in the course you apply for, determination, willingness to work hard, conscientiousness, some degree of ambition. For character it's about fitting into student life as well - developing new skills, trying new activities, making the most of your time at uni.
For anyone interested in Law; if in an interview they asked you "If you got oferred a place, which aspects of your character and personality would you like to develop here?" how would you answer?