BUR #4781 has been approved by @evazion.
create alias kengan_ashura_zero -> kengan_ashura
I don't understand why the kengan_ashura_zero tag exists in the first place. There is no "Kengan Ashura Zero". There is a volume 0 in the series Kengan Ashura. But it introduces no new characters, only backstories for some features in Kengan Ashura.
There is no instance where the kengan_ashura_zero tag should be used, but not the kengan_ashura tag as well. And there is no meaningful case where the kengan_ashura_zero tag will be useful in addition to the kengan_ashura tag