Argument that Hwang and Lizardman actually are in, or, if not them, that there are in fact two more characters after Cervantes and Raphael.
So, there's 149 weapons, shown by the trailer showing off museum mode. This is enough for 21 characters to have 7 weapons, with 2 left over, or 18 characters to have 8 weapons, with 5 left over. Including Cervantes and Raphael, we have 19 characters (not counting Geralt), so it can't possibly be the latter, even if having an excess of 5 weapons wasn't already pretty weird, while having an excess of 2 can be either two characters who only have one weapon, or one character who only has 1P/2P weapon (like Dampierre).
So, who would be those 21 characters?
I'm not counting Geralt, because it's likely that he's our Dampierre-type, not having an array of weapons. He may have a "2P" weapon, though.
Another possibility is that Azwel doesn't have alternate weapons, either, and the 21st character is including Tira.