Situation: I'm playing S&S Merisiel, in her Shadow role, and I have the power feat reducing BYA and AYA damage to zero.
I am sharing a location with another character (let's say Gronk), and that character encounters a monster that deals BYA damage to everybody at that location.
To date, we have been defining 'you' very tightly, meaning Merisiel cannot use her ability to reduce damage, since Gronk is the one encountering the monster and thus is the character who is acting (aka 'you'). Since Merisiel is not acting, her BYA ability doesn't work.
Is this the correct interpretation?