Juubey ジュゥべぇ
Described as a fairy (妖精 yōsei), but very likely an Incubator, he was the Pleiades Saints's contractor. He is particularly notable for being able to clean their Soul Gems by his own, relieving the girls of the need to compete for Grief Seeds. (Source: Puella Magi Wiki) His name is a pun on Kyuubey's, as "kyuu" can be read as 9 in japanese, just as "juu" can be read as 10.