Gertrud Barkhorn is one the 501st Joint Fighter Wing from the Karsland Forces. She's is a powerful and stern fighter that takes pride in her duty.
Gertrud is an 18 year old witch from Karlsland. She is a level headed, calm and quiet person, Due to her calm nature and her skills form her years of service she is very powerful and racks up a large shot down tally.
She has been acquaintances with Minna and Erica for a long time, Erica is her best friend and they are seen doing a lot together, such as visiting her little sister.
Gertrud has a little sister called chris who slightly resembles Yoshika, she was badly hurt in the invasion of their city by the Neroid years before. She fell into a coma but woke up in the present time.
Her powers grant her super strength, she has been seen lifting up heavy objects a normal person wouldn't be able to, she wields dual MG42 Machine guns.
Trudie at first seems cold and distant but eventually warms up to Yoshika