He restores the bespelled human to his human form and suspects he is made of and Prince Justin's body parts.
Sophie meets Howl for the first time when he rescues her from soldiers who are harassing her by calling her 'Sweetheart' and apologizing for being late and saying he was looking 'everywhere' for her.
Later on in the movie, Sophie Hatter cleans his bathroom and switches some hair potions, leaving Howl's formerly blonde hair a ginger color, which later turns a raven black colour.
In the book of Howl's Moving Castle, Howl has "marble like" green eyes and it is unclear what his natural hair colour is.
This practice also is why the Witch of the Waste cursed Howl, as she was jilted by him as well.
He hates to be pinned down to anything, and is quite cowardly.
On the night before Midsummer's Day, Howl goes to Wales for a Rugby League Reunion and gets himself drunk out of fear.
Even in college, he wrote his thesis on magical spells and charms, and joined a group of other gifted magicians on Earth.