I don't see how this analysis goes against me saying Chi would fit into the leadership role more than Jr or Minnie.
If you're assuming I'm underestimating Jr and Minnie, while overestimating Chi, I disagree. Everything you've stated, we've already known. In all honesty, I don't really see any useful information in you post :p
Jr has the nergal, so he must be compared to Grim and Nergal Junior. His mental state isn't one where he'd go and take charge, unless he finds it necessary.
Minnie has had the tutors and resources Mandy didn't have available for their respective age. Yet, Mandy as a child was able to accomplish much more with her limited resources, than Minnie. Of course Minnie's life has been more sheltered, but that's made Minnie very hesitant. I mentioned that Minnie had to be tested again, based on her 'new' attitude, we've yet to see if her resolve has changed.
Chi, however, being as idiotic and arrogant as she is, impulsively does what she wants and pushes people around. When she developed her powers, she immediately tested to see if she could do things Aku hasn't. This would imply that her grasp on the basics of the powers are set, just as how Aku and Blossom were, but again, this is an implication, since we haven't seen Chi in combat. But, based off her mentality, IF they were all friends, then Chi would be ordering them around.
I never said she'd be a good leader or a good friend. Just a leader. A bossy person that the others wouldn't have to deal with.
As I mentioned, the cliche would be for Chi to fall in line behind Jr.
What would probably be for the best, is to watch Chi show off her abilities against some of the guards, minions or Cerberus. Then people would get a grasp on her abilities, instead of throwing her straight to Jr and Minnie.