Final answer:
The English voice actress who frequently voices blonde characters with eyepatches, including Nice Holystone from Baccano! and Marie Mjolnir from Soul Eater, is Caitlin Glass.
Step-by-step explanation:
The English voice actress commonly known for doing voices for blonde females with eyepatches, such as Nice Holystone from Baccano! and Marie Mjolnir from Soul Eater, is Caitlin Glass. Caitlin Glass is a renowned voice actress, ADR director, and script writer in the anime industry. Her unique voice has brought to life numerous characters in various anime series, making her a recognizable talent in the field.