I dont think she was charismatic at all. She had to butt heads with Naveen, who was so easily charmed by woman. I dont think she believed in being charismatic actually. She wanted to work up her way through hard work not charisma. But still the least charismatic of all, imo.

I think Elsa is the least charismatic because other than Anna who seemed to have a really big heart, no one really seemed to be mesmerized or captivated by Elsa. She was so shut in and away from everyone else that it's really hard for her to even try to be charismatic.

Although I think Tiana is certainly not the most charismatic, I think her friends trying so much to pull her away from work kind of shows that she has a little she could tap into if only she focused on it rather than work. It seems like they had tried multiple times to no avail to include her in their activities despite her being a workaholic.

Similarly, I think Merida is a tad charismatic as well but like Tiana doesn't really tap into it. I think Merida has potential to be charismatic but not much more than, or possibly equal to, Tiana.

^i absolutely agree on all points here. I had a tough time selecting between Tiana and Elsa. But eventually selected Tiana that despite having a friend like Charlotte and a supportive mother, Tiana just couldn't be charismatic.
At least people seem to be happy initially that Elsa was crowned as Queen and could draw attention to herself, even if for negative reason, for her ice powers.
For Merida, she could actually quiet down the chaos between the clans with her speech, when she put her mind to it, drawing an applaud from all - her parents and the clans. I'd say that was commendable esp knowing that they were angry with her. I'd say there are other princess who are less charismatic than her.

^ I agree with your points and you have convinced me than Merida is probably more charismatic than Tiana afterall though admittedly I do still find Elsa to be the least charismatic even more so than Tiana though I think they are closer now after hearing your opinion than I did before. :) Thank you so much for sharing your detailed opinion here, it helped me see another perspective!

^I'm more than happy to share my opinions. And I'm super happy i could help you see another perspective :) Yes, Tiana and Elsa are close call actually.