Lucy means bratty, selfish, vicious, evil and more. She may brag a little (Or a lot). She is very annoying and is constantly lying in front of your face. She may be a anime lover, but she really isn't. She said she'd cosplay as Mitsuri. She will pretend to be emo, depressed and has anxiety. She will keep on dating some random freaks on discord.
Simple terms, Loli is referring to a petite woman. It is a more heavily stylised form of anime with emphasis on a "cute" style with large emotional eyes, small noses, shorter height and large heads compared to bodies, SHOULD NOT BE SEXUALISED. IF I SEE ANYONE SEXUALISING LOLI ME AND THE FBI WILL FUCK YOU BRUTALLY WITH A CHAINSAW. It's kinda sick, they look so young, no, keep Loli SFW, it's the right thing to do.
(Take this definition with a grain of salt I am only human I may have missed things)
(Take this definition with a grain of salt I am only human I may have missed things)