Ahaa, so Shiro takes risk with standing there and affected by own jutsu? But then again puppet users harden themselves to be immune most toxins. But then again my char could do Extreme effort to add +4 to his Str regarding feats of strenght so he could lift both female guard and Shiro into air and then run for it :P. Altough he would try knock Shiro off her but question is would Tashi see him there pressing knee on her? Also what's your rule regarding unseen bull rush attempts? Tashi would become visible but not before he body rams to Shiro and push him into poison cloud and then make run for it with female guard.