In the first drafts of the scripts Lu was supposed to be a vampire, but the idea was abandoned because it became too dark and they wanted to do something happier.
Fully produced in the Adobe Flash platform, according to animation production company Science SARU's website. Its North American premiere at Fantasia International Film Festival was sponsored, ironically, by ToonBoom, a rival system.
Lu is Christine Marie Cabanos' second mermaid character. She also voiced the titular character in The Squid Girl: The Invader Comes from the Bottom of the Sea! (2010).
Michael Sinterniklaas (Kai) and Alyson Leigh Rosenfeld (Isaki) would later appear in Promare (2019) in which they voiced Vinny and Aina Ardebit respectively.