That was fixed this patch. Sunny Flipflop and Scarlet Vex now both have it.
Viewing post in Sunfish City - a trait swap game v0.26.1 comments
I just checked Sunny and they didn't have it, would I need to start a new save file to update the npcs? I also don't know where to find Scarlet Vex. I'll probably try to get the trait from the altar (once I figure out how to find it). For the record, I'm playing through itch.io's browser.
EDIT: Turns out I needed to start a new save file for Sunny to have the Leadership trait. Darn. Oh well. Keep up the good work!