As long as it's the same character but not the same individual within the diegesis, sure. There's plenty of precedent for that, one of the most prominent being Tingle, who I hope will appear. The series has produced many very strong and unique characters that haven't been too intimately tied to any one game's main storyline to seem out of place in other appearances. Characters like Salvatore, Beedle, the mailman, the bombers, and the rabbitland rescue guy all deserve at least cameo appearances in future games, and many of them already have.