d'Arturo Insiguente, Miguel Leon
Regulus often encounters Nexus.
Regulus dons the traditional armor of the Knights, adding, however, a cape and helmet resembling a short-maned lion.
- The alias Regulus utilizes at one point has a few interesting anagrams that apply neatly to his character:
- Ornate Erudite Guns (Regulus is a refined and intelligent gunman)
- Aune Untested Rigor (Aune meaning "chaste", applying to his pure intent and unyielding loyalty to Antares)
- Tortured Gneisenau (being a German submarine which received heavy scourging similarly to the treatment experienced by Regulus and Antares when they are captured)
Regulus and Antares were created to fill the role of a precocious interfering duo. They are inspired by such characters as Biggs and Wedge from Final Fantasy, Solt and Peppor from Chrono Cross, Logos and Ormi from Final Fantasy X-2, and "Basil" and "Cuthbert", the spies from Chitty Chitty Bang Bang.