Now, I'm a big fan of the N girls (AKA transfer students) from LLSIF. Waaay back when I first played SIF, before I knew basically anything about the franchise, Haruka Konoe was my very first LL best girl, even before Maki. I lost my shit when she came on screen in the Niji anime. I'm so happy that she and all the other transfer students got to shine on the small screen (and now the big screen, too, with the Niji movie)!! It's so good that they were immortalized after the shutdown of SIF. They deserve fame and love just like the main girls do... Anyway! Here are some resources for you and the N girl lover in your life:
TenFes 4koma comic series starring the transfer students
LLSIF Transfer Student Database
I'm sure we all know about SukuTomo, but... I'll go ahead and link the pages anyway. Keep in mind these don't include Shizuku, Emma, or Kanata. Otherwise, these are the cards for the students of Touou Academy, Shinonome Academy, Shion Girls' Academy, Y.G. International Academy, Seiran High School, and Chitose Bridge High School.
For your convenience, these are the pre-Niji cards of Shizuku Osaka, Emma, and Kanata Konoe.