(This is the page for Cardinal, the SkyWing. You may be looking for the human Cardinal instead.)
The Jade Mountain Prophecy
When Peril, Scarlet, and Soar visited the Wingery to capture Cliff, he and the other dragonets were discussing how Scarlet's disfigured face looked, and it was mentioned that her face supposedly looked even grosser than when Cardinal drooled in his sleep. He then promptly told the others to shut up.