Everyone here loves Courage, but who exactly is he? He's a scared dog that does whatever he can to protect his home, Nowhere.
Where is Nowhere? Is it the place where there is nothing? no one? no hope? hell?
He protects his home and makes sure no one harms Muriel. His master sits in his chair and hates everything. Whenever something evil comes to attack or rule over nowhere, he fights back. keeping Muriel safe and Eustace's home from being destroyed.
Muriel always sees a new head on courage whenever something evil comes to warn her, giving him multiple heads, for his and her safety.
He will forever stay in hell(Nowhere), to protect his home, keeping Muriel(humanity) safe from the evils of hell(le quak[greed], Naughty Fred[murder], Katz[hate], and ect). His master Satan/Hades(Eustace) will rule over and hate all that is Hell(Nowhere, Muriel, Courage).
He is chained and loves his place, He is Cerberus, our courageous but cowardly dog.