I am Aika Sumeragi. She works as a salvager who works under Gozo Aida and the partner of Rion Aida. Aika is a beautiful white-skinned young woman with waist-length light-brown hair that is tied at the back of her head with bangs hanging on the left side, light blue eyes, red lipstick and rather large breasts. Aika has shorter hair that she wears down where part of her hair is braided on one side.

She wears a long-sleeved short red dress and white thigh high stockings. She also wears white panties.

During the beach episode, Aika wears a purple ome-piece swimsuit. Aika is 16 years old in this series who starts her job as a salvager by her foster parent. Later, she goes to school and she is recruited by Eri Shinkai to go on a expedition to solve the mystery of Karen Minamino's past