Known as Blueberry Ai Kanda—potentially an alias—Blue features long navy blue hair and matching eyes, marked by two distinctive navy teardrop patterns beneath her left eye. Her attire combines a black bow, black gloves, and a sword-shaped black tie with a navy vest over a light blue shirt, a black belt, a navy skirt, and thigh-high boots. She wields a uniquely shaped scythe bearing a contorted blade and a large blue eye embedded at the hilt's top; this weapon cuts through nearly any substance. Her personality exudes intensity and overt sexuality, paired with a notable fondness for surströmming.

Originally imprisoned by the SSC in solitary confinement, Anarchy freed her during a raid, reintegrating her into Akihabara's resistance. Post-release, she aided in retrieving the magical girl Pink, serving as the sole interpreter for Pink's incomprehensible speech. Her motivation to fight the SSC centers on a wish: attending a live New Order performance after otaku culture's restoration. Throughout the conflict, she battles alongside Anarchy and Pink against SSC forces, including elite units like the Four Heavenly Kings. These engagements include a clash with @-Go and a confrontation where an antagonistic magical girl overpowered the trio.