Howl's Moving Castle 2004 quotes, page 4

It was clear Howl had not yet caught the girl he was after. Sophie listened to Michael asking rather obvious questions about it, and Howl slithering neatly out of answering any of them. "He is a slitherer-outer," Sophie murmured to a pair of Michael's socks. "Can't face his own wickedness."

p. 189.

p. 261.

p. 265.

p. 293.

p. 65.

p. 72.

p. 76.

p. 78.

p. 86.

p. 91.

pp. 289-290.

Said by Sophie.

Said while Sophie is using him to burn dust and rubbish.

When he is locked out of his own home.