Mew is a Major class Idol in PriPara. She makes her anime debut in Episode 11.She is New's sister.
Similar to her sister, they seem stuck up. Both are confident in their status and demand respect from those underneath them. They also seem to want the spotlight as they were not too happy when Usagi revealed that both of them were backup to Sophie. However, to someone they see as admireable, they do not mind as much.
(Source: PriPara Wikia)