create alias hephaestus_(danmachi) -> hephaistos_(danmachi)
The spelling in the series comes from the Greek, rather than the Latinized, form. Some official sources have her name spelled "Hephaistios" which I don't think is etymologically correct and doesn't appear to match the katakana (ヘファイストス) either. At the very least, the extra "i" is clearly not there when it appears on the knife in episode 3 of the anime.