CircusP (formerly Doofus-P or matt9five) is a young producer. Some of his original works even appeared on Vocaloid Rankings. He has also created a few voicebanks in UTAU such as Chii and Aido Feirune, and also the creator of fanmade vocaloid Kasane Keko. Unlike many producers, he draws his own art most of the time.
On May 04, 2011, CircusP deleted many of his Youtube videos. Later, he closed his accounts on sites such as Youtube and Deviantart. It was confirmed that these sudden actions were made for various reasons