seeing some discourse. knife sisters, vivienne is with you, vivienne is one of you. but of guns, please consider:

( https://www.pixiv.net/en/artworks/90351590 )

the slow and methodical nature of knives is a pro, yes, but the immediacy of firearms are not a con: rather, they will keep your fight or flight on full blast by their potential right up until the absolute terror upon their trigger

that is to say, knife girls and gun girls are not enemies. in fact, they are kissing, sloppy style, boobs squished together, etcetera. perhaps one has the cold blade of a knife pressed against her neck, and the other has the cold barrel of a handgun pressed against her head.