Mr. Nguyen (portrayed by Richard Eng) is Tina, Tuan & Linda's father.

He appeared in the second part of "Over a Barrel" where he had a terrible argument with his son Tuan. That's because Tuan's grades have slipped lately, he skipped school and he was late for dinner and that's because he was focusing more on the band than his education. Tina even argued with Tuan because of it. But eventually after hearing Tuan's music, they straighten things out.