Ramazani completed his switch from Charlton Athletic recently.
"Largie is a tricky wide player who was with Charlton and likes to play on either side," McKenna told manutd.com.
"He is very two-footed and likes to score goals. He has a bubbly personality and usually has a smile on his face around the place.
"He is one of the younger ones but I am sure he can do very well."