The Sixth Part of the Will appears as a raven and is also capable of transforming into a variety of other things. The Sixth Part of the Will was able to communicate with Arthur whenever he was drenched in rain, because Superior Saturday had hidden the Will in the rain by scattering its type in every raindrop, the most complicated method of hiding the Will seen so far. To free the Will, Arthur had to go to the Midtower Rain Booster Tank, because that was where the rainwater was collected. The Will then instructed Arthur to swim out to the middle of the Tank and call for the Will with his mind, so it could resume its form.
It likely represents the virtue of Charity, showing more kindness to others than the other parts of the Will, evident when it shows a willingness to save Suzy from the Artful Loungers . Suzy later expresses regret when it has been absorbed, saying "it was the best part, if you ask me," and hopes that it will have some effect on Dame Primus , but, like in the case of Part five, this does not prove to be the case. It appears to be the most intelligent part of the Will, as it denies the rumours that if the House is destroyed, then the Secondary Realms are also destroyed. The Will instead says that the whole of creation will only cease to exist if the Incomparable Gardens are destroyed, as they came from the Void first and are the true epicenter of the Universe.
Interestingly, Part Six is the only part of the Will to have a main part outside of its respective book.