Birthday: November 10 Katsura Yukiji is the 28 year old sister of Hinagiku. She is a world history teacher at Haku Academy and doubles as a 24hour gate guard. She refuses to let Hayate enter the school when they first meet because she is afraid that letting unauthorized personnel on campus will result in a salary deduction for her. Her attitude softens after Hayate first saves her from falling off the clock tower but she still almost causes Hayate to be rejected from Haku by unnecessarily making him anxious during his entrance exam. She repays Hayate by telling everyone in her class on Hayates first day that he is a super cool person. She has a group of underachieving students Izumi Miki and Risa who hang out with her a lot. She lives on the Haku campus she tells Hayate that she does this so that she can save rent money and use that money to buy alcohol instead. It is a recurring gag that she will do anything for money going as far as to allow an evil spirit to possess her because it told her it would give her a million yen. When Makimura Shiori is sent to teach at Haku Yukiji is demoted to subhomeroom teacher. She later regains her position as homeroom teacher when Makimura is promoted to a higher position. In the extras of volume four of the manga the author writes that before starting the Hayate no Gotoku manga he had created a oneshot manga where the story is about a female highschool student and her little sister trying to pay back a 80 million Yen debt then writes that these characters are in fact Yukiji and Hinagiku.