Yada is the big sister of Class 3-E and one of the most enthusiastic students about learning the art of infiltration from Irina. She's been described as being adult-like and cool to the point that Kaede Kayano admits that she admires her despite her large bust. Yada does not like violence, which is why she commits herself to negotiation in order to avoid fighting. As one of the more enthusiastic students in terms of Irina's lessons, Yada has gained notable skill in bribery, blackmailing and swindling as shown when she successfully drove away two thugs away by pretending to be a mafia princess.