All that stuff presented in Descr strat.
Traits, ancillaries, age etc...

Code:
character	Flavius Julius, named character, leader, age 47, , x 89, y 82 
traits GoodCommander 2 , NaturalMilitarySkill 1 , GoodDefender 1 , PoliticsSkill 3 , GoodAdministrator 2 , Austere 1 
ancillaries aged_retainer
army
...
+ then you changing age it most likely game wont start, cause of plenty other related characters; age varying is limited, so you cant have 20-ish father and 40-ish son

Spoiler Alert, click show to read: 
Code:
character_record		Amulius Julius, 	male, command 0, influence 0, management 0, subterfuge 0, age 13, alive, never_a_leader
character_record		Manius Julius, 	male, command 0, influence 0, management 0, subterfuge 0, age 10, alive, never_a_leader
character_record		Decius Julius, 	male, command 0, influence 0, management 0, subterfuge 0, age 7, alive, never_a_leader
character_record		Marcus Julius, 	male, command 0, influence 0, management 0, subterfuge 0, age 3, alive, never_a_leader
character_record		Faustina, 	female, command 0, influence 0, management 0, subterfuge 0, age 48, alive, never_a_leader
character_record		Poppaea, 	female, command 0, influence 0, management 0, subterfuge 0, age 29, alive, never_a_leader
character_record		Alypia, 	female, command 0, influence 0, management 0, subterfuge 0, age 29, alive, never_a_leader
character_record		Claudia, 	female, command 0, influence 0, management 0, subterfuge 0, age 28, alive, never_a_leader
character_record		Fadia, 	female, command 0, influence 0, management 0, subterfuge 0, age 13, alive, never_a_leader


all traits listened in export_descr_character_traits.txt; ancillaries in export_descr_ancillaries.txt