One of Oono's American friends, Susanna (more frequently known as Susie or Sue), is a petite girl with an avid interest in yaoi. Susanna comes off as somewhat harsh and unsociable, and startles the other Genshiken members by using crude anime and manga quotes in Japanese (written in katakana to show her unfamiliarity with the language). As she makes gains in comprehension, her responding solely in quotes makes it unclear just how much Japanese she understands, much to the chagrin of Ogiue and others. Her extensive knowledge of anime and manga quotes suggests that Susanna is well-versed in both, having seen Shinseiki Evangelion, Kimi ga Nozomu Eien, Hokuto no Ken, Saint Seiya, Inuyasha, Mahoromatic, Azumanga Daioh, Doraemon, and Lupin III, among others. She also seems to be obsessed with Japanese culture. As for her age, it is undetermined, and those who would know (i.e. Oono) refuse to tell. Susanna wishes to study in Japan in the near future.

In the relaunch of the manga, Sue has transferred to Shiiou University and is a first-year student and new club member of Genshiken. She is very close to Ogiue and still spouts various anime and manga quotes. She is employed by Ogiue to be one of her assistants for the official manga Ogiue is writing and drawing.

(Source: Wikipedia)