Complex sentence: Her Shōkanjū is clad in heavy armor and wields a large sword and during the ESB field error, it looks like an adult version of herself with the costume resembling Morrigan Aensland from "Darkstalkers".
Split into simpler sentences: Her Shōkanjū is clad in heavy armor and wields a large sword. During the ESB field error, her Shōkanjū looks like an adult version of herself, while wearing the costume resembling Morrigan Aensland from "Darkstalkers".