User blog comment:Miskos3/Fairy Tail Episode 230: The Demon Returns, Review/@comment-31.132.65.54-20150426170658/@comment-7418318-20150427185542

The only people who knew that Ultear was there were the following:
 * Jellal, who was saving Erza, who needed saving a lot more due to her injuries.
 * Millianna whom Ultear told about being at fault for the ToH. But of course Milli wouldn't look for Ultear after that.
 * Kagura who overheard the same thing, again not going to look for her with anything other than killing intent.
 * Natsu who was in a life-or-death battle against F-Rogue and thus could spare neither the time nor the attention to worry about anyone else.
 * Meregy and here we have the jackpot. Want to guess what Meredy was doing when she ran into Gray and Juvia? Yes, she was looking for Ultear!

So I really don't get what you're so upset about. Everyone who knew about Ultear being there either had a damn good reason not to look for her or was actually looking for her.