Alucard doesn't require extra souls and familiars when he has Schrodinger, he's omnipresent and immortal.
That said, Alucard literally has no way to harm Yamamoto tbh.
STE
StealthRangerS Class Demon
I generally tend to ignore Schrodinger Alucard in debates because it's ambiguous as **** and generally used as an excuse to keep him around against beings overwhelmingly beyond his verse, kind of like how Wolverine can last against characters way beyond him due to his adamantium skeleton and regen