Theo could not say he cared about Frank Longbottom or his death. In fact he probably would not have cared about the existence of Neville either had it not been for public image. It would not look good not to show up to such a thing as this. After all, Neville would be on the board for the bank, just as he was on the board of governors for Hogwarts. It was only fair that he'd pay his respect by coming, though he'd left Padma at home with Nathaniel.
As he heard Neville's words about his father, he could not help but to think of his own father, and how he wished he'd never had to know him. For his part his father had been able to be there, just never cared to be, and when he had been, Theo had mostly wanted him gone. Until Rodolphus had entered his life when he was a teenager, he had never known a father figure.
He sighed as he thought of the fact that he now had to work against the man who had in so many ways been what his father should have been. He would do it, of course, because it was the way to keep himself alive and his family safe. At least in the long run. That didn't mean he had to like it very much. In fact, had he been a man who bothered to think of what might have been, he would have wished things to be remarkably different than they were.