Who drew the Monogatari Series characters?
This is art made by Akio Watanabe based on Vofan's original concept arts. The same staff have been used for all current series so far.


  The anime adaptation of Bakemonogatari aired between July 3 and September 25, 2009 on Tokyo MX. The series is part of Kodansha's Nisio Isin Anime Project and is produced by Shaft, directed by Akiyuki Shinbo with assistance from Tatsuya Oishi, written by Fuyashi Tō and featuring a character designs by Akio Watanabe based on Vofan's original concepts Source