Ok, idk if I should post it here and whether it's a bug or just how it's supposed to look like, but the Demonia Blaster weapon sheathed looks like the saber weapon instead of the twin machine guns.

That is by design; the Demonia Talis also looks like the Sword when sheathed.

All Scion classes' "signature weapon" series have this same gimmick of looking identical when sheathed (for example, the Resonant series for Phantom, or the other one for Hero, the Adel series).

Ok, so it is by design then. TY for the response.