Dabi-no-ji runs a mechanical goods shop specializing in karakuri devices, supplying merchandise essential for combating supernatural threats. This includes specialized onmyo-dan bullets effective against otherwise invulnerable Ayakashi entities. His technical expertise encompasses creating and maintaining mechanical constructs, notably the transformed ninja monkey Sasuke Sarutobi, one of the Sanada Ten Braves altered by external mystical interference. Dabi-no-ji demonstrates basic English communication skills during initial interactions. His pseudonym translates to "the Initial Dabi," but his true identity is Leonardo da Vinci. He provides critical strategic support by pinpointing vulnerabilities in adversaries, specifically identifying ocular weaknesses in certain Ayakashi, and facilitates their defeat through tactical advisement. His inventions and insights consistently aid protagonists against antagonistic forces.