Trunks had kept his eye on Vegeta and Cassie sparring. Both because he wanted to watch, but also just in case something went wrong and he needed to intervene for other people's sake. He was proud of them both, and grateful to his father too. For recognizing, and helping, in his own way.

Trunks had shoved his own frustrations aside and down--because he had a Fight Club to run. Much as he'd love to be right there with Cassie pounding on a target. He'd kept himself very controlled during any spar, because he was locking down his frustration. But it still simmered. Maybe when it was all cleaned up, he'd leave one dummy out and practice on it for a bit.