Tag Alias/Correction: sandaime_muramasa -> sansei_muramasa

Tag Alias/Correction: sandaime_muramasa -> sansei_muramasa
Relatedly, Tag Alias/Correction: nidaime_muramasa -> nisei_muramasa

Reason: It's been incorrectly translated for a long time now.

For incorrect romanizations try to include the original text in whatever language it happens to be in.

Sure. Sorry. Here's the simplest official source of Sansei, the pixiv encyclopedia entry for her: http://dic.pixiv.net/a/%E4%B8%89%E4%B8%96%E6%9D%91%E6%AD%A3

On multiple official Japanese pages, her name is Sansei when written in hiragana. It seems some translator went with Sandaime however long ago and English speakers just ran with it.

Did
create alias sandaime_muramasa -> sansei_muramasa
create alias nidaime_muramasa -> nisei_muramasa