for Code Name Komiko by Naomi Paul
On the surface, sixteen-year-old Lian is a serious student and dutiful daughter, destined for a fine career as a concert violinist, but Lian has a secret identity. She is part of 06/04, a band of cyber-investigators who work to expose injustice and corruption. In this virtual world, Lian goes by the code name, "Komiko." Lian has no trouble keeping her daily life separate from her secret one, until a dead body washes up in Big Wave Bay. Lian investigates, with help from 06/04. Soon, she meets Matt Harrison, the new kid at her school. She learns that Matt's dad, Rand Harrison, is a corporate goon, whose clothing company exploits its workforce. And she finds a connection between the dead girl and Mr. Harrison. Lian and the 06/04 team are thrust into their most dangerous investigation ever, and Lian will learn that no one is ever quite who they seem to be...
Publisher description retrieved from Google Books.