If you'd like to make your own post, or if you think Trunks would anyway, don't let us stop you! But he can also bring it up in the post made by Gen and Roland, and I know it'd be encourage for Trunks to speak more about at the meeting, I'm sure. :)

But I do think the armour might come up between Tidus and Piccolo too. And Tidus would want it brought up during the meeting- There's also other avenues known (Spider/Kumoko can craft magical clothing), so putting them all forward in one place would be good.

And tbh I'd totally rather Trunks talk about the armour!