Darts (ダーツ) is a constructor in Priestella.
Darts is an adult man with a mustache. His long hair is covered by an iron skin-tight helmet. His left eye is for some reason covered by an mechanical binocular eye. He wears a black shirt underneath his coat.
Darts is a brave man who fought for Priestella following the orders of Otto Suwen. Otto and Darts are business friends, as Otto is shown to have shared a drink with him in the past. In addition, Darts was described to be a workaholic, who couldn't abandon a job half-done, going as far as to keep working during the battle for Priestella.
During the attack on Priestella, Otto asked Darts to repair Roswaal's Book of Wisdom which had been burned.