Ema Maeda
Ema Maeda appears in the epilogue to Love Hina that is found in book 14, set 3 years after the end of the main story. She is a 15 year old girl hoping to get into Tokyo University and is a new resident at Hinata House. She does not appear in the anime.
Her introduction to the Hinata House parallels Keitaro's. She finds the house deserted, so goes to take a bath in the hot springs. A 3-years-older Shinobu then gets in, thinking Ema is Kaolla (because Kaolla was wearing a mask and Shinobu thought Ema was Kaolla because Ema wore a mask too) and comments on how big her breasts now are, showing them to Ema. As with Naru and Keitaro many years earlier, Shinobu realises Ema is not Kaolla, screams and chases Ema through the house.
Ema then makes some Keitaro-style mess-ups, including trying on the headpiece of Naru's wedding dress and tripping an alarm Su had set up then fleeing with Keitaro who appears in a Seta-style van crash.
Keitaro brings her back and Ema is rewarded with a kiss from Naru for bringing back her fiance. It is at this moment that she realizes she can make it into Tokyo U.