Pareo is like. peak cute character design. you can do so much with her hair & eye colour ... and she's cute without necessarily looking young / babyfaced (even though she is the youngest), she just has a really neat aesthetic. off the top of my hat the only other character who has this much variety with their gimmick alone I can think of is Asuka from iM@S, and for her it's not to the same extent ... it's a simple yet very unique quirk that makes Pareo stand out & vary it up a lot without ever sacrificing her identity

idk I just love her design a lot!!!