I haven’t used the portrait of
Sima Wei (Fire)
Sima Ying (Water)
Sima Yue (Metal)

Here is my suggestion

Gao rou as Gao gan nephew or brother
Lu yu as Lu zhi son
Niu fu as Dong zhuo son in law or son
Zhang miao as Zhang chao brother
Xianyu fu and Xianyu yin I think they are related
Yuan yi as yuan shao and yuan shu uncle
Cao de as cao song son
Bao dan as Bao xin
Bao xun as Bao xin son
Li ying and Li li , Li xian as Li jue brother and nephew
Wang jing and diaochan as Wang yun son and daughter

Adding Guan Yu and Zhang Fei to Liu Bei family tree maybe similar to the way Wu does there's, just cool to have them on there and it saves 4k in adoption fees lol

Sima Wei if I remember off the top of my head correctly has the leopard skin on his armor? So maybe as a bandit of some sort? I'll keep my eyes peeled over the course of my Yan campaign I just started.

Would personally love to see Sima Yue's aesthetic reused. Potentially for Li Dian or Xiahou En. Sima Ying could be used for Fu Gan in Ma Teng's faction.

wangping，BC219 join liubei in history....
Xiahou Zuo is the grandson of Xiahou Dun in history...They shouldn't show up at the beginning.
because lady xiahou's birth age always changing,
No need to use koei settings,At the beginning, only the lady Xiahou will be retained in Cao Cao's faction.