Under One's Wing Meaning

Example :   He took the promising student under his wing.  The promising student came under the professor's wing.  He remained under the great man's wing after graduation.  Now a professor himself he has young students under his wing.March 15 2012, Soctt Tobias, The Kid With A Bike [Review]  By happy accident, Cyril runs into Samantha (Cécile de France), a single hairdresser who takes him under her wing—first to help him find his missing bike and father, and later, on weekends away from the group home.