Aqua also known as Water Ignis, is a water Ignis originated from Miyu Sugisaki (Aoi Zaizen's childhood friend). She became partners with Aoi to save Miyu.
She is voiced by Ayako Kawasumi.
Aqua, much like her fellow Ignis, is a humanoid, digital being. Her hips are more hourglass shaped, as she is the only female. She has twin pigtails that levitate from her head. Her eyes are pink with eyelash marks. In pure data form, her eyes are yellow and her body is sky blue prism like data. In her physical form, her body is icy blue with blue raindrop shaped markings, one resembling a skirt accessory. In stature, Aqua is one of the shorter Ignis, with Windy being the only one shorter than her.
Aqua is a responsible, caring, and perceptive Ignis who has the skill to tell the difference between truth and lies, which has kept the Ignis and Cyberse out of harms way until now. According to Ai, she was the Ignis that wanted peace within Cyberse the most and unlikely to betray the others. It is also revealed by Lightning and Ai that she was one of the Ignis who wanted to coexist with humans.