Ayaka Nishiwaki (西脇 綾香, Nishiwaki Ayaka), nicknamed A~chan (あ~ちゃん, stylized as a-chan), is a Japanese singer and dancer. She is known as one of the members of the Japanese electropop group Perfume.
Known For: Acting
Birthday: 1989-02-15
Place of Birth: Hiroshima, Hiroshima Prefecture, Japan
Also Known As: a~chan, 西脇 綾香, A~chan, あ~ちゃん, Aa-CHAN, Perfume