Hiso no Tsurugi is the name of the sword in the games, but if you want an english translation for it, you can change it to Sword of Hiso.

Love that expression Remilia and Sakuya are wearing. Just screams "Oh, you have got to be shitting me."

Well, the tag (and indeed your own translation of the later comics) identifies it as the Sword of Hisou, so I changed it accordingly. Thanks for doing the translation in the first place, though.

Goodbye, mansion.