Re: Lui probably being half-Thai, other than her debut, she also tweeted shortly after the above announcement:
DeepL: "I'm going to be at Comic Con in Thailand this month, so it's been a while since I've studied Thai with my mom."
Out of Holo's SEA Vtubers, Iofi and Ollie have collabed with Thai corpo Vtubers before. Iofi collabed with Polygon Project's Aisha to learn basic Thai for watching Thai dramas, almost 3 years ago. Ollie collabed with Polygon Project's Hoku 6 months ago. At the time Hoku even joked about HoloTH.