Yes, quite funny that his character was / (is still?) sweet on Dani.
Well she has had one longish period out of the show. That was when she broke up with Wyn.
Her going off to tend a sick mother leaves open the possibility of her coming back at some stage.
Another character who I thought might come back (but didn't, and probably won't now) is Beth, who was Wyn's "business partner" in Spain, and came over as the original manager of Copa. It soon became clear that she and Wyn were more than business partners. I used to quite like Beth (another southerner, played by none other than Catherine Ayers). But she showed an unpleasant side of her character. She was helping herself to cash from the till at Copa. (I think she thought she was "entitled" as she thought the business deal she had with Wyn over Copa was unfair).
There was a girl (name temporarily forgotten! - now got it - Kim!) who used to house share with Llio, and used to have Iolo as a boyfriend. However, she split up from him and moved out (leaving the field clear for Llio & Iolo...). By then she was working at Copa, and Beth and Wyn offered to let her stay in a spare room at Wyn's large house. That went ok for a while, but Kim caught on to Beth's stealing of Wyn's money. Beth became aware of this, and then schemed (somehow) to make it look as though it was Kim who was stealing. She then blackmailed her to leave Glanrafon (she went to London), in return for not shopping her for the stealing (which she was innocent of in any case, but could not prove - Beth was too cunning).
More on Kim: she was always secretly sweet on Barry (she used to work at Tŷ Pizza), but Barry took her for granted and ignored her.
However, just before Kim left, Barry seems to have seen the error of his ways, and realised that he loved Kim after all (or as near as Barry can get to love...). This led to the following scene, which I eventually dug out of the Youtube RaR archive:
Watch and weep. (Bangor station for the train spotters... ).