"Pollux, Netherwing Husk, Ferry of Souls" has entered MoC, which I think means it cannot be reasonably considered a major spoiler at this point.
I agree it is not a major spoiler, and there should be an alias, but I wonder if the other direction would be more appropriate, given Netherwing is used as a proper name by the game in the kit description etc. and is probably what most people think of as the name. On the other hand, Pollux is the true name and it looks like what the HSR wiki is using, so I dunno.
Somewhat related, I'm unsure what to do about calypso_(honkai:_star_rail); there should be an alias to or from Cerces but I don't know what direction to make it. If I understood the last patch's story correctly, Calypso is actually the correct "real" name there but Cerces is probably how most think of the character.