Usagi (Birthname: Will Michael Georges Sandrelli Mezza Bonjour Francois Girgil Je T'aime the Fourth) is a mascot character in PriPara. He manages Shion's, Dorothy's, and Leona's PriPara team - Dressing Pafé and was the previous manager of Sophie Hojo.
Usagi is somewhat easygoing - and during his time as Sophie's manager, he seemed to be very proud of her; when in reality, he was just using her in order to fulfill his goal of becoming the top manager. He is also very judgmental, and extremely boastful - he rubbed it in other managers' faces that Sophie was better than most of their idols. Because of his huge ego, he didn't want anyone else to find out about Sophie's Fancy Mode, as he believed it would ruin his career. Later, he hired Dressing Pafé, and consequently became very boastful of them since they made an amazing debut. It is unknown whether he still cares for his former idol Sophie.
Usagi tends to add "~usa" to the end of his sentences.
(Source: PriPara Wikia)