Tagging this as "Lou's mother" instead of "Emma" because the latter is not her actual name, though many people think it is. The misunderstanding is apparently due to an episode from the animated series in which Josh calls her with the letters M and A (using the French pronunciation). According to TV Tropes and French Wikipedia, the creator Julien Neel explained this in a 2018 Q&A, but I haven't been able to find it (and I wouldn't be able to understand it anyway unless it had subtitles).