A normal high school girl and self proclaimed friend of Sonya, who is often friendly to Sonya despite how dangerous she is. She tends to take on the brunt of Sonya's attacks whenever she takes her by surprise or goes overboard with her pranks. She is quite simple minded and is not afraid of Sonya at all, despite the fact that she is an assassin.

Kill Me Baby
Kill Me Baby follows the comedic life of a typical school girl Yasuna and her assassin classmate Sonya. Sonya's attempt to fit in often fails when her natural assassin instincts kick in and Yasuna's attempt to be more friendly with Sonya often gets her hurt or intimidated.