Deterrence

From Inga no Kusari wiki

Deterrence is Ambrosius Rorek' glint.

Deterrence takes the form of his left hoop earring embedded with a red ruby which glows and vibrates when activated.

Glint Ability

This glint embodies Rorek’s own pacifist nature and activates when anyone approaches him with any harmful intention. It senses their motives and makes him aware of it, but this can only occur if the person is within a certain range and in his field of vision. On himself, when harmful thoughts grow in his heart, ‘Deterrence’ halts it from growing and reminds him of his own true nature through a sonic emission tuned solely for his ears.

His initial range is 3 meters with this number multiplying by 2 for each Fullbring Tier.