Milk

Fourth of the Adepts, nicknamed Whisper Bomb, currently little to nothing is known about her. She is a young girl, as young as Ekaterina probably, who appears dressed in a regal gown but, oddly, has her face always concealed by a gas mask and, even more oddly, is often sorrounded by cartoonish explosives, such as bombs, missiles and torpedoes. She never spoke since her introduction, but it is known that her element is hydrogen, as she combined her powers with Aoi Kuchiba, who wields oxygen, to manipulate water and reveal the concealed sanctuary of the Theotokos. (wikipedia)