Open English Wordnet
Adjectives
(a)unsympathetic, unappealing, unlikeable, unlikable(of characters in literature or drama) tending to evoke antipathetic feelings“all the characters were peculiarly unsympathetic”
(a)unappealingnot able to attract favorable attention“they have made the place as unappealing as possible”, “was forced to talk to his singularly unappealing hostess”