Tag Alias: seto -> yagisaka_seto

Aliasing seto -> yagisaka_seto.

Reason: Artist's full name is 矢木坂せと and romanization of family name is given on Twitter.

It's an alias from a very ambiguous name, but it looks like this is a rather large and long-existing artist tag.

EB said:
It's an alias from a very ambiguous name, but it looks like this is a rather large and long-existing artist tag.

Just leave a note on the former wiki page? 250 posts or not...

Yeah, it's just too ambiguous sadly. Edited and note left.