The pencils were done on November 1st, and inked/colored on tablet in Flash, assembled in Photoshop, and signed in Flash - the result was finished right at the end of November 7th.
The cast of characters depicted above are:
Tack the Cobbler: Dipper Pines
The Thief: Lil' Gideon Gleeful
Princess Yum-Yum: Wendy Corduroy
King Nod: Stan Pines (Grunkle Stan)
Zigzag: Robbie V.
Mad and Holy Witch: Mabel Pines
The Mighty One-Eye: Bill Cipher
More to come!