Mertesacker, Sofia

She is a voluptuous second year exchange student from the US who is a member of the Swords of Salvation. When speaking Japanese, she adds some English words to her sentences. She also uses common Western expressions. During her spare time, she does volunteer work for her church.

As a Shirogane, she converts her light skills into what she calls a Kongoutsu, which is basically an armor of light that protects her skin from any strikes. However, it doesn't protect what she wears, leaving her vulnerable to being naked.

Kanzaki often calls her "American Cherry" referring to her huge bust size.