Board Thread:General Discussion/@comment-35539169-20180712072427/@comment-10380701-20180712081125

According to Monty, Wilt and Blush was directly inspired by a completely different sword with a similar concept in mind, which is Kagura's sword from Ga-Rei: Zero.

Vergil's is likely a coincidence since the Iaido style is a pretty common fighting style in fictionland since it looks so fucking cool.

Adam's entire character concept are basically coincidences with two extremely popular katana users.

Granted, I wouldn't say it's not far off for Monty to have been somewhat inspired by Vergil since he at least seems to be a DMC fan based on his like for Bayo in one video back then. Jin Kisaragi is also a potential reference point since he's a huge fighting game fan, particularly of Blazblue.