Emi comes from a
distinguished family and attends a prestigious private school in Armstone
City. She is cared for by her grandfather who is a robotics expert. One
day, her grandfather was abducted. Emi hacked into the city's computer
systems and discovered that B.M. was holding him at the prison island.
Taking the Teddy Mech given to her by her grandfather, she becomes a Viper
and sets out to rescue him.