Hilda Arc[]
Katze was introduced as the representative of Regiment Hex at the Bandire. She began arguing with the Vatican representative and personal nemesis, Meiya Romano, regarding peace.[1] When the time came to choose a side, she chose Greneda due to her hatred for Meiya. When the fighting started after the sides were chosen, Katze and Meiya fought each other until Kinichi Tohyama (Kana) put an end to it. After the "Seven Stars of the Golden Shell" was split after being removed from Aria H. Kanzaki body, Katze took one and retreated into the mist back to Germany.[1]
Normal Life Arc[]
Katze was briefly mentioned by Tamamo as having fought Meiya to a stalemate before retreating to her base in Berlin with the Liberty Mason exorcists searching for her.[2]
Ranpan Arc[]
Regiment Hex Arc[]
Katze is first mentioned Lisa .She tells Kinji that Katze held a conferences with how to deal with him. Lisa ask Kinji how he survived falling from Regiment 'airship. He explains what happened and his battle with Katze. Katze attacks the chapel where Kinji's group is located with Patra and Sarah. She has a captured Kinji handcuffed. She and Lisa talk about Kinji's fate. She takes the captured Kinji and Lisa to Grenda's hidden base.