Request to extend the NIN weapons (Fangs of the Silver Wolf) into Viper weapons.
Rei / ZERO from the series is canonically more akin to a Viper and also combines his two blades like a Viper into a single double bladed weapon.

Also he charges up and glows blue in the actual show just like Viper's Reawaken.




The model's already there, just need to stick'em together