Mumble is an emperor penguin (i believe) that has a disorder that affects the shedding of his Down (the soft feathers that the young usually have)
Victor describes him as having a "noble spirit," of being "perfectly humane, thus thoughtful in his generosity, thus packed with kindness and tenderness amidst his passion" that is that the opposite of Victor World Health Organization is given as self-serving and chesty. ... Henry is additionally given as being packed with live contrastive Victor's gloominess.
hope this helps :)