Aika Imaizumi (今泉 愛夏, Imaizumi Aika; born July 29, 1995), known professionally as Lovely Summer Chan (ラブリーサマーちゃん, Raburī Samā-chan), is a Japanese singer and songwriter. From 2014 to 2015, she was the lead vocalist of the band For Tracy Hyde.
Source: “Lovely Summer Chan”, English Wikipedia (CC BY-SA 4.0), excerpt