Tania Gunadi as Emma Lau/Dark Tamara: A nerdy computer-savvy tomboy who is Charlie's next door neighbor. She knows of Charlie's double identity and works for Mr.Hall. She is very proficient in hacking and stealth tactics. She created most of Charlie's weapons and is a 2nd degree weapon specialist. She, like Charlie, has an alter-ego her avatar, Dark Tamara. It is also revealed that her first kiss was with Jason, in episode "Game On" to hide the secret of S.T.A.N. being a android when his hand fell off.