As we all know, from the first time Erasa met Gohan she liked him, but then, Videl has interfered and breaking the heart of her best friend. Certainly Erasa felt down for this (she has never gone to visit Gohan,Videl or Pan) but surely she has decided to get over it and move on (she is a beautiful girl after all). It's simple and clear she isn't interested to Sharpners when Gohan was still single. Certainly she thought "Why Videl, what has she that I haven't?she's uglier than me...so why!? maybe because she's rich and strong?" probably in the next school years she has also tried to separate them in any way pretending to be their friend, but seeing that their relationship became stronger every day she surrendered (Poor Erasa :( ). What do you think she decided to do after this sad story?