Starsign: Capricorn
Naruko is a childhood friend of Jinta and Menma, though she and Jinta have grown noticeably distant over the years. She keeps up a cold front around him, but it's clear she cares—fans often note she's probably the closest person to him these days. She still attends the same high school Jinta bailed on.
Despite claiming she hasn't really changed, Naruko tends to go along with whatever people suggest, as Chiriko's pointed out more than once. She's popular at school and has no problem hanging with girls that Chiriko would probably judge harshly.
What's interesting about Naruko is how her interests—she works at a video game store and has amassed a serious manga and gaming collection—actually became the bridge that let her reconnect with Jinta and Poppo after they'd all drifted. It's one of those small things that brought the group back together, even if awkwardly at first.
Content compiled by AnimeList.moe from publicly available sources.