Some of the last remaining characters now have entries, Letuchaia and Pauki.
I'd never had any doubts about Pauk (Паук, spider), but for whatever reason they are using the plural Pauki (Пауки́). As a name, I prefer the singular and it also matches the katakana (パウーク pauuku) better. For this reason I will continue to use Pauk in this blog, but I have already updated ANN and Wikipedia with the "official" spelling Pauki.
I have no problem with Letuchaia as I was never sure exactly how best to spell it anyway. What they are using is basically a simplified version of the ALA-LC romanization of Летучая, from Летучая мышь (Letuchai͡a myshʹ) or Летучие мыши (Letuchai͡a myshi), which means bat or bats respectively (literally "flying mouse").
A translation of their profiles:
Letuchaia
Called the "Princess" of G-society, she is 10 years old and proud to be an original Nouvlesse. Her "Crazy cracker" ability allows her to manipulate energy in a super-excited state like a yo-yo.
Pauk
Letuchaia's cousin, he is also 10 years old and shares the same ability. He acts maturely for his age - except when it comes to Letuchaia, who he is head-over-heels for.
(translation assistance from ilmaestro)