About

Sentinel Individuals with highly developed five senses, such as hearing and vision. They possess exceptional abilities but are unable to control their own power because it is too intense. Guide Beings capable of controlling a Sentinel's power. Through physical contact, they can draw out the maximum potential of a Sentinel's abilities or suppress powers that have gone out of control. Sentinels cannot survive without a Guide. Consequently, many Sentinels become dependent on their Guides, whereas Guides can live without Sentinels. Guides are often targeted by enemies as a way to weaken Sentinels. Partial Individuals who have 1 to 4 senses that are superior to normal humans. Mute People who possess no special abilities and are neither Sentinels nor Guides. They make up the majority of the population. Zone A state where a Sentinel has overused their abilities and lost control. Care from a Guide is required. Zone Out A worsened state of the Zone. It involves mental derangement, coma, and is life-threatening. Shield A mental wall. Without it, the five senses become overstimulated. The inner thoughts of Sentinels and Guides also become exposed. It can be developed through training. Care / Guiding The act of a Guide calming the powers of a Sentinel who has entered the Zone. It feels like rebuilding a Shield. For mild cases, holding hands or hugging is sufficient. For deep synchronization, kissing or sexual intimacy is required. Highly compatible Care can be pleasurable and arousing. However, if the Guide lacks mental fortitude or if compatibility is poor, the Guide risks falling into a state of confusion or danger. Bonding The act of a Sentinel or Partial and a Guide forming a partnership. Once a Bond is formed with one person, the Guide cannot perform Guiding for anyone else. The Tower An institution that manages and trains individuals. It dispatches Guides and assigns missions to Sentinels and Partials. Perfect Match Compatibility between Sentinels, Partials, and Guides is expressed in percentages. This refers to a case where compatibility is 100%. If compatibility is poor, Guiding is painful and cannot be performed effectively. Spirit Animal Sentinels and Guides are accompanied by animals that embody their abilities. If the person weakens, the animal weakens. Only the person themselves or their Bonded partner can touch the animal. VEIL The organization to which Hai and Yuzuha belong. A state-run organization that cooperates with the police to solve cases involving ability users. NOX An organization that aims to "save" the world from being dominated by Sentinels. It is composed mostly of Mutes and uses cowardly tactics to target Guides.