What AI do when interaction needs secondary actor or secondary recipient

[Tickyyy]

I'm a new modder trying to create new interaction.
I already know that ai choose secondary one by populate_actor_list and populate_recipient_list.
But I want to figure out that how ai select secondary one by characters list witch added from populate_actor_list and populate_recipient_list.
Does AI considers every one in characters as secondary_actor or secondary_recipient and then do the redirect before calculate ai_will_do?