Nurse Kusuri (ナース薬, Naasu Kusuri) is the best and single most skilled doctor and pharmacist belonging to the heroes association. Known simple as nurse kusuri, she has mastered all forms of health care and medical procedures in existence, including the creation and administering of medicinal drugs and formula's, as well as advanced medical proccesses such as surgery. She originally started out as a simple doctor at the heroes association headquarters, though her skills were so great that she became a hero. She now stands as an S-Class hero due to her feats of caretaking as well as the numerous monsters she has defeated. She is one of the most vital aspects of the heroes association due to the fact she is in charge of making sure other heroes remain in top physical condition and good health at all times.