Chris is Trude's younger sister. Before season 1 even starts, she's badly hurt and ends up in a coma, though she does eventually wake up and make a partial recovery. Trude clearly loves her—in season 2, she goes out of her way to buy Chris a dress and tries to snag Marseille's autograph for her since Chris is a big fan. Weirdly, Chris bears a striking resemblance to Miyafuji Yoshika.
The character's name is actually based on Gerd Barkhorn's real-life wife, Christl.
Content compiled by AnimeList.moe from publicly available sources.
