There was a slight stiffness in the way she said "Morning," which told Harry that she was still disapproving of the way they had arrived. Neville Longbottom, on the other hand, greeted them cheerfully.
Uncle Vernon was large and neckless, with an enormous black mustache; Aunt Petunia was horse-faced and bony; Dudley was blond, pink, and porky. Harry, on the other hand, was small and skinny, with brilliant green eyes and jet-black hair that was always untidy.
Ron was now staring at Lockhart with an expression of disbelief on his face; Seamus Finnigan and Dean Thomas, who were sitting in front, were shaking with silent laughter. Hermione, on the other hand, was listening to Lockhart with rapt attention and gave a start when he mentioned her name.
On the other hand, I would advise you, Lucius, not to go giving out any more of Lord Voldemort’s old school things.
...he looked resentful and sulky. On the other hand, Ginny Weasley was perfectly happy again.
On the one hand, Tom Riddle, poor but brilliant, parentless but so brave, school prefect, model student … on the other hand, big, blundering Hagrid, in trouble every other week, trying to raise werewolf cubs under his bed, sneaking off to the Forbidden Forest to wrestle trolls ….
There are no more uses of "on the other hand" in the book.
Show samples from other sources
Change can be hard to deal with. On the other hand, it often brings opportunity.
I think she’s pushy. On the other hand, my boyfriend describes her as assertive.