I am Shergey Federation

I don't remember much of his name. If there's any mistake, I'm sorry.
Nikolai Sergeyevich has a son named Seresa. 

He was a Prussian officer He has dark blue eyes, black hair and fair skin. He has some freckles on his face. Overall, he is handsome. He is 187 cm tall, He has shoulder-length hair and a part of his hair that is level with his ears, resembling a dog's ears that are drooping down(Those are not dog ears)

(guts & blackpowder oc) 
A lonely Prussian officer

He was a 6 year old boy who had to become a soldier in World War II. And the story is based on a true story🤑
He has a father named Nikolai Sergeyevich
(Probably the adoptive father)

Seresa from Soldier boy(2019)

Hans is a German soldier who is 169 cm tall. He has dark blue-black hair and light skin. He has a timid personality and likes to be next to Sako.
Sako's full name is "Heinrich Jaeger" but other German soldiers like to call him "Sako" and he has black hair and light skin and sharp fangs, and he is a gentle but sometimes scary vampire And he is 198 cm tall
Hoffman is a relatively quiet and intelligent German soldier, and he has blonde hair and light skin Lieutenant Schmidt is a nice Lieutenant. 