I think atthias is talking about the battle models that get assigned via descr_strat\script, eg where blue is the custom model assigned to the character and red is his body guard (taken from crusades):
Code:
character Nur ed-Din, named character, male, leader, age 44, x 156, y 84, portrait nur, battle_model Sultan_Nur_elDin, hero_ability Light_of_the_Faith ;Mosul
traits Factionleader 1 , GoodCommander 4 , PublicFaith 2 , Intelligent 1 , ReligionStarter 1 , IslamHero 1 , JihadHistory 2 , AssassinMaster 1 , SpyMaster 1
ancillaries apothecary
army
unit Nur adDin exp 3 armour 1 weapon_lvl 0
The teutonic script offers a sample how to assign a battle model to a new faction leader\heir:
Code:
;apply the Hochmeister battle_model to the Teutonic Order faction leader whenever a new leader is assigned
monitor_event BecomesFactionLeader FactionType teutonic_order
change_battle_model teutonic_order leader Teutonic_Hochmeister
end_monitor
Replace 'leader' with 'heir' if desired.