get_guardian_scope_effect

get_guardian_scope_effect = {
	if = {
		limit = {
			any_relation = {
				type = guardian
				always = yes
			}
		}
		random_relation = {
			type = guardian
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			exists = court_owner.court_position:court_tutor_court_position
		}
		court_owner.court_position:court_tutor_court_position ?= {
			save_scope_as = guardian
		}
	}
	else_if = {
		limit = {
			NOT = { exists = scope:guardian }
			exists = court_owner.court_position:court_guru_court_position
		}
		court_owner.court_position:court_guru_court_position ?= {
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			is_ruler = yes
			any_parent = {
				is_available_ai_adult = yes
				is_in_the_same_court_as = root
			}
		}
		random_parent = {
			limit = {
				is_available_ai_adult = yes
				is_in_the_same_court_as = root
			}
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			is_ruler = yes
			any_courtier_or_guest = {
				is_available_ai_adult = yes
			}
		}
		random_courtier_or_guest = {
			limit = {
				is_available_ai_adult = yes
			}
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			any_parent = {
				is_ai = yes
				is_available = yes
			}
		}
		random_parent = {
			limit = {
				is_in_the_same_court_as = root
				is_ai = yes
				is_available = yes
			}
			alternative_limit = {
				is_ai = yes
				is_available = yes
			}
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			any_sibling = {
				is_available_ai_adult = yes
			}
		}
		random_sibling = {
			limit = {
				is_available_ai_adult = yes
				is_in_the_same_court_as = root
			}
			alternative_limit = {
				is_available_ai_adult = yes		
			}
			save_scope_as = guardian
		}
	}
	if = {
		limit = {
			NOT = { exists = scope:guardian }
			liege ?= {
				any_courtier_or_guest = {
					is_available_ai_adult = yes
				}
			}
		}
		liege = {
			random_courtier_or_guest = {
				limit = {
					is_available_ai_adult = yes
				}
				save_scope_as = guardian
			}
		}
	}

As written in game/common/scripted_effects/00_childhood_effects.txt.