Since your reading this, it probably means that the title caught your attention so let's not delay the inevitable and tell you why I made such a claim
The reason why I think ragna doesn't belong in vs matches is because of three things, three things that would make fighting ragna and winning close to impossible without the right conditions and without the person who's making the fight forget multiple details on what ragna can do
1: he's basically somewhat omnipotent at his best
If you don't know after central fiction, ragna got his hands on the azure aka the true book of the blue blaze which he used to erase the very memory of him. Anyway with the azure, ragna is basically a bit weaker alien X, and for those people who know how overpowered alien X is then you get the gist of this point already and can skip it, but for those who don't, it means he can literally do whatever he wants so there's no chance of beating him unless his opponent is omnipotent as well
2: he lives outside of logic
As the black beast, it is stated that it lives outside of logic, don't know what the hell that means? It means that you could literally blow up black beast ragna with enough TNT to destroy something of his size 1,000 times over, and he wouldn't even have a scratch on him so just killing him with destructive force is tossed out of the window and got ran over by a ground of stampeding idiots
Now finally
3: nu
Before you question why is the last reason nu? Let me tell you this, it is stated in the story of blazblue that ragna and nu have a life link with each other, which is basically a buddy system version of immortality cause when you have a life link with someone then if your killed while the person you have a life link with is still alive, then you tell death to go skrew itself and keep on living, so if ragna was in a vs battle to the death where it was only him and his opponent, he would be unkillable since as long as nu isn't anywhere close to the battle and doesn't die the exact same time as he does, he can literally win all of his vs matches by standing still and tanking it all
Now do you know why I made a claim like ragna not belonging to something like vs matches? Good then tell me what you think of this chapter so I will know that you at least somewhat enjoyed it somehow
