I'm going to sound ignorant right about now...
... and immature. But my ADHD mind has to ask a couple questions about the female yordle champions.
First question (and stay mature, people): Is Tristana the only yordle with cleavage?
I mean her classic skin makes us know it's there. Some of her other skins (like buccaneer) make it obvious, and so on. Poppy has no such...features. Granted she wears armor to battle, so that makes sense that even if she had them, we would be none the wiser. Lulu is wearing cloth clothing. Makes sense since she is a magician instead of a warrior. Do I see anything? No. You could argue that Lulu is still a kid, but Riot has not confirmed the ages of any champions. You could say that she acts like a kid, but it is also possible that she is an adult yordle who acts like a kid because she's that nuts. Of course, she had to have matured, since her own time is centuries earlier. Her parents are long dead and any family she might have now would have no idea who she was, meaning it is up to her to survive.
Side note: I am Lulu on the RP boards, and I have her as a young adult. Since my writing tends to be more dark, I don't have her as happy go lucky as most people would.
Second question: I have read many RPs and fanfiction. Of the three of them, Lulu easily takes the prize of "most loud and obnoxious." This would probably be almost universally agreed on with the community (with some exception, I'm sure). That said, how come she has the fewest voice lines of all three of the female yordles?