>>3251346Dark Knight Ingrid is a spinoff of Tamainin Asagi, not the other way around.
Actually, Ingrid is a spinoff of a spinoff of Asagi. Ingrid was a character from Taimanin Murasaki. Only Pixy/Lilith chose to name the anime version of the game to Ingrid instead of Murasaki (which was an excellent choice imho) although Murasaki bumped Ingrid off the spotlight at episode 3.