How do I flip/mirror 3 player in 3 team?

I'm having a little trouble with the (flip/mirror) sprite problem

my problem is that i have "character" , enemy1 , enemy2

I want to handle it so that when near each other, these three characters will face the direction of the nearest enemy (character , enemy1 , enemy2 are three independent teams),

I have handled character and enemy1, however when having enemy2, I realized that even when standing close to each other enemy1 , enemy2 don't face each other, they always face the "character" no matter how I edit the code, what should I do?

p/s : i add

character and enemy 1 in a family A >< enemy 2

enemy 2 and character in a family B >< enemy 1

enemy 1 and enemy2 in a family C >< character