This paper proposes new dramatic structure, 'role triangle' for accomplishing role ambivalence the goal of role method. Robert Landy said the role ambivalence can be approached through role-counter role-guide. To locate those roles he developed several tools, Role profile, Role checklist and TAS and extracted heroic narrative structure from the result, 'i am this', 'i want to be this', 'this is obstructor','this is helper'. Role profile and Role checklist are both linguistic projective self reporting tools and the results can't go beyond participant's self-recognition. TAS is too opened structure to assess one's role system especially role-counter role-guide. Most of all, the limit of existing tools is that they don't focus their effort to grasp the dynamic of role-counter role-guide. Role triangle is developed on these understanding. It abridges role-counter role-guide to victim-perpetrator-guide under-standing all psychological disorder can be a variation of PTSD. The victim implies a wound. It can be a receptive capacity. The perpetrator implies power, and it can be expressed to self-assertiveness. The second constituent element of it is animal metaphor. Animal is very powerful archtype, and it makes much easier select and express roles for different participants. And Role triangle is a sequential structure. On diagnostic phase, it figure out two roles, the victim and the perpetrator. That is leading to exploration of each role and their common desire/theme. And based on this, it choose the third role guide and carry out an experiment of their possible and desirable dynamic. Role triangle is also dramatic structure engages embodiment and role compared existing tools. I, researcher used this role triangle to dramatherapy with the disabled children's mothers, and described participant A's case. Her victim(the weakest and worthless) was a head lice and her perpetrator(the strongest and violent) was an eagle. Living as a head lice gave her an opportunity to encounter her deep anxiety and guilty, and through a perpetrator role(an eagle) she could rehearse and strengthen her self-assertiveness. Her victim and perpetrator share the desire of power of gaze, so the third role guide need to be relaxed one free from that value judgemental serious world. It was an squirrel for her. Finally she made her mind map composed of three roles, and I, researcher helped her accept the victim instead of rejection, redirect the perpetrator toward outside, and relate the guide with the other roles.