Kishimoto Eriko
First appearance in manga: Chapter 135
Eriko is a beautiful young idol and something of a celebrity, which makes her instant popularity among the other players pretty much inevitable. She gets swept up in Izumi's massacre in Shinjuku like everyone else, but that's actually how she ends up becoming a game participant.
She's best known for developing a crush on Kurono pretty quickly—specifically after watching him fight during her first night playing. Fans often note that despite her idol status and relative inexperience, she's surprisingly effective in actual combat against the aliens. She turns out to be way more capable than you'd expect.
Content compiled by AnimeList.moe from publicly available sources.