
On top of my head prolly: “My mom entered a contract marriage” Bcs the mc wasnt actually the regressor so she actually thinks like a child.
But well, realistically, liliana is closer in acting like a child imho(in a childish and bratty way—the author got it so right) while Lyrica is more on the cheerful but very goody two shoes kiddo type of way.

Now that you mentioned it, Parentified makes everything click as to why i always thought lyrica was mature.
She became her mom’s parent at such a young age which is very contrary to liliana’s circumstances where she can freely be childish. They only are similar by the same fear of abandonment insecurity.
i really love how liliana acts like a kid, thinks like a kid, not like any reincarnation childcare manhwas. this shit right here is my guilty pleasure.