I know that there's already a style after him but I'd like to see a Doppelganger themed weapon. My idea for it is that it would be a whip made out of light or dark. You would be able to change it by using some sort of combo, kind of like in Bayonetta with Durga and Undine. The light whip would have higher damage overall and it's attacks would blind the enemies, making them slower and sometimes attack in the wrong direction, the dark whip on the other hand, would be faster than the light whip but with lower damage and it would leave some sort of a curse on enemies making them more vulnerable. Both versions of the whip would have a different moveset. The last few attacks in combos from both whips would summon the Doppelganger who would use the same attack but with the other version of the whip. For example, if you would finish a combo with the light whip, a dark Doppelganger would appear and he would use the dark version of your attack, if you finished a combo with the dark whip, you would summon a light Doppelganger who would use a light version of your attack. During Devil Trigger, the Doppelganger would appear on each attack.