First of all, Deino are notorious for chomping on everything in sight. As such, you might want to prepare a type of gauntlet or glove that it can happily nip at. If it's comfortable and sweet when it evolves now, the chances of its temperament changing dramatically when it evolves is very little, which might happen if you don't pay any close attention to it. [ What would she give to have a non-sociopathic Hydreigon existing in Johto... ]