Similar to Illuge, Aleda can easily pass as human when clothed, her attire of choice being a fur coat. Removing her coat reveals that her entire midsection is a grotesque face, with eyes forming from her breasts, a large nose, a mouth with sharp teeth extending to her crotch area, and gigantic ears forming her shoulders and upper arms. Her hands are long, sharp claws.
Aleda was in a plot alongside the sadistic turtle demon Jinmen and a gigantic tunnel demon, kidnapping people on subway trains as they are devoured by the tunnel demon, where Aleda and Jinmen would then set upon them and either kill or eat them.
One of these trains was the 16:10 Shinkansen which was carrying the young girl Sachiko, After she notices that they had traveled into the tunnel demon, Jinmen comes through and reveals himself, the frightened passengers run back to the back of the train running into Aleda, they try to get past but she throws off her coat revealing her true demonic form.