Senso is the Vice Head Chief of the Berzerkers — the curator of Berzerk Law, fourth royal guard of Zaidan's top Seven, and a man of the Oligarch race, born with an innate understanding of the laws of the universe and gifted with both great wits and a great power.

He is a disciplinary man, born in the very lands he now stands guard over, and he has been part of the Berzerker Monarchy since its inception. He seems a young man of about twenty-three, light brown eyes carrying a glimmering sheen of intelligence — and his actual age is in the late five hundreds. His authority is not rank alone: Senso can manipulate and control law itself, to any extent of his wishes. His power is Law Regulation: Equality, the power of law and order; his is the Second Amendment: Right To Bear Arms, the summoning of weapons of any kind — past, present and future; and his named technique, Law Binder, binds his judgements into blades and hourglasses that strike where he chooses.

His sheet describes the office in one breath: law binding, patroller and guard about the territory of Zaidan, ensuring issues don't evolve into chaos. He upholds the law in any universe; even on his travels he upholds justice, will solve any mystery to be discovered, and slay any foe before him. When the council of the High Realm sat in despair over the fallen world in 2021, arguing whether a dead god could be followed at all, it was Senso who ended it with one sentence — "We have word that he has Awakened" — and upon his words, the others remained silent. He died with the other six loyalists to buy that awakening. In the revival, the law walks again.