Aikoka

Aikoka is a fictional concept that appears in the anime series "Kekkaishi". It refers to a type of yokai, or supernatural creature, that feeds on the negative emotions and psychic energy of humans. These creatures are often drawn to places where strong negative feelings, such as fear, anger, or despair, are prevalent.

In "Kekkaishi," the main protagonists, Yoshimori Sumimura and Tokine Yukimura, are tasked with protecting their school from these yokai. They are part of the Karasumori clan, a group of skilled ayakashi hunters who use special magical barriers, known as "kekkai," to seal away or destroy yokai. Aikoka are particularly insidious because they don't necessarily possess physical strength, but rather manipulate the emotions of their victims, often leading them to self-destructive behavior. Their presence can create an atmosphere of dread and unease.

The abilities of Aikoka can vary, but they are generally characterized by their ability to amplify negative feelings. This makes them a significant threat, as they can weaken their targets mentally and emotionally, making them easier to consume or control. Overcoming an Aikoka typically involves not only physical barrier techniques but also mental fortitude and the ability to overcome one's own negative emotions. The "Kekkaishi" series explores themes of confronting inner demons, which is directly mirrored in the struggle against these particular yokai.