Nekota Anzu and Goushi Naomasa are the new original characters CLAMP has created for the CLAMP Festival who will be featured in the manga giveaway and in an original anime shown at the festival. The director of Tiger and Bunny, Keichii Sato, will be in charge of the anime.
ETA: Seiyuu for the new characters will be Hiroshi Kamiya and Nana Mizuki.
And a larger image of Kobato. Volume 6 is up at Amazon.jp