The guards in Constantine's mansion, known as Constantine Guards, are fast, organized and aggressive. They can be easily recognized by their distinctive magenta and black uniforms.
These guards can be found in great numbers throughout the mansion, and they have high battle skills, close to those of the Hammerite Guards. They are also highly alert, so avoiding them on the tile floors of Constantine's mansion is not easy, and once they detect Garrett, it becomes difficult both to fight and to flee.
They are however only armed with swords, which means they can only attack at close range, and their rather low health proves a weakness. Using a bow or other ranged attack from a distance may be an effective way to deal with them.