Aries - Renzo Shima

Taurus - Shiro Fujmoto

Gemini - Konekomaru Miwa (his name literally means 'circle of kittens' :D)

Cancer - Shiami Moriyama

Leo - Rin Okumura

Virgo - Amaimon

Libra - Izumo Kamiaki

Scorpio - Ryuji Suguro (Bon)

Sagittarius - Mephisto Pheles

Capricorn - Yukio Okumura

Aquarius - Kuro (he is 121 years old!?)

Pisces - Shura Kirigakure