Thrall will likely set up a clinic to tend to anyone wounded in the conflict but has no interest in the conflict itself. Though if Gil continues to kick someone while they're down, he will intervene. Thrall is... fairly OP in his own right when the situation calls for it, so that could potentially be a thing.

Laharl will step up and kick Gil out if worst comes to worst. Laharl is OP as fuck when he's serious, so I'm not worried about him getting hurt. That said, if someone else has already plotted to resolve the conflict and would rather Laharl stay out, that's cool too, he can probably just sleep through the whole thing.

The only other party really interested would likely be Krillin who would end up acting as support for Gohan... though he knows when he's outmatched and wouldn't try to take Gil on head-on. He may attempt a distraction to get people out of harm's way, but nothing more than that really.