In the case of Liz, she latched hard onto an obscure character from a specific spinoff of a series and just ended up adopting that name. Not just the first, but the surname as well. In my case, Fauna just "felt right," for lack of a better explanation. Beyond that, every time one just sorta coalesces, usually it's something starting with L, but also oftentimes they don't really manifest beyond an approach to thought processes, I guess?
Sometimes there's only two in the system, sometimes three. It varies

