A very small number of superhumans. They gain their abilities through acquired awakening. However, they suffer from side effects of overly sensitive senses, and sometimes go into a frenzy. The lower the 'Guiding Level', the more sensitive the senses become, and the more dangerous it is. They receive management and support from the state.
They have no superpowers but exist to prevent Sentinels from going berserk. Usually stabilize the Sentinel through 'guiding' via physical contact. A-grade or higher guides are effective just by being nearby, and the deeper the contact, the stronger the stabilizing effect.
A binding process conducted after the Sentinel and Guide find each other as partners. It becomes legally effective when reported to the state or institution, but bonding can also be completed through sexual relations.
Both Sentinels and Guides are graded through tests and evaluations. Ranks range from S-grade to D and E grades, and ordinary Sentinels receive guiding from a Guide who matches their rank.