Possible character name change for Aiu

BUR #20603 has been approved by @evazion.

create alias aiu_(character) -> egg_(aiu404l)

I do not know much about this character, but I couldn't find any official source for the name to be "Aiu", and one of the more recent tweets says that her name would be "egg". I don't know if this is just one-off humor or the actual official name, so this is a discussion & BUR for that.

In any case, *_(character) is not a good qualifier.

The bulk update request #20603 (forum #257443) has been approved by @evazion.