Are Guardian Bosses concidered as "Foes"

Cant find info online . I got “We will meet again cards equiped” that gives -12% from foes at 50% of life.

My question is are Gurdian bosses or Normal Bosses “Foes”? Or does the card tooltip has to say exactly “Boss”

any enemy will hit you for 12% less when you are under 50% hp with that set equipped

Every attackable unit in this game is considered a foe with the exception of destroyable objects and other player characters in certain mechanics. As for what effects actually apply to Guardian Bosses if the effect states either foe, boss, or guardian raid it will have an effect on those cute beasts.