Thanks for that bit of "history" about smols vs. lolis. It seems logical to split young girl LIs into groups as follows: 1) lolis (which I believe were more or less defined by the Japanese as pre-pubescent or appearing as such even if they are 4000 year old goddesses), 2) smols (puberty to early teens, roughly equivalent to the term "tween") and then 3) teens for girls from about 15-19 years old. That's basically the way I've seen the terms deployed on this site, it's the way I use them, and I would even advocate for the creation of a "smol" or "tween" tag because of the fact that "loli" usually means very, very young and "teens" more often than not indicates
legally adult teens of 18-19, leaving literally nothing to describe girls between about 10-17 years old. Other than that, you kinda missed the actual point I was making in that we jump straight from pre-pubescent. 9-10 year old Leana and Hailey (and 7 year old Tiffany) to (fully or nearly-fully-developed) 15 year old Alice with no puberty aged girls in between, which I feel is a slight lack. No big deal though and I'm not the dev.
As for who the dark-haired girl was...ketzal's own words prove she WAS supposed to be Hailey, but he changed his mind and made her younger and blonder.