Howard last name is more Germanic & British but it was her father name not her mom. We are talking about her mom and her heritage (a child takes more gene from mother vs father anyway). Hispanic has a very distinctive English accent (just listen to Ironmouse the most stereotypical Hispanic English accent you can get).
Either way, a trend of corpo chuuba introduce their works to parent (starting with Haachama a few years back) and have their parent make cameo on stream is quite interesting. In the case of Gura, hope there’s no psychopath who recognize her mom voice as some lady live in the neighborhood.