Mary tries…but then Jin walks in sweating after her training that day…

Jin's would be something about using her power for good, and probably be called like "Righteous Fist"
And Mary's is about putting on a performance and something like "Shadow Show"

Mary would be THRIVING. She loves spooky/haunted places. Jin on the other hand would be a bit more nervous since ghosts are kind of a blind spot for her. (can't clearly sense the aura of spirits, not to mention ghosts are immune to punching, lol) But if Mary's there she'd feel a lot more confident.

Jin takes the approach of teaching her mon their strengths and weaknesses, this includes type advantages as well as strategies for fighting given their respective body shapes. It's basically a strategy similar to how a martial arts teacher would teach their students. And to go even further, Jin doesn't give commands during battles instead trusting her team to make decisions for themselves.

I guess a less known fact would be that Jin can fluently speak at least three languages, as well as understand parts of others.

Jin's actually really comfortable surviving out in the wilderness, from finding food to even some making potions from wild plants. 100 days is no small task but I think she could do it.

Mary loves horror games. Especially with Jin sitting next to her watching along reacting to all the jumpscares that don't phase her.

"My sister can be a handful sometimes, but she has been my standard for strength since we were young. And it is that standard I hope to live up to."

"Jun Wu has truly grown into a strong and just warrior, and I couldn't be more proud of my little brother. He's come a long way from being a crybaby Kubfu that followed me everywhere, haha!"

Jin's Urshifu is usually pretty stoic but he warms up around the team. Her Lucario is very polite to others but sometimes her immature side can show, especially when dealing with the Urshifu who she has a bit of a crush on. Her Arcanine is super friendly and energetic, and her Audino is the oldest in the group and is team mom. Ao Qin, her gyarados is usually pretty grumpy but he's learned to begrudgingly play nice with the team since he's known most of them since he was a Magikarp. HOWEVER, he has a long standing rivalry with Jin's Pidgeot, who loves to mess with him.

Jin doesn't really go out of her way to catch mon so her team isn't especially large to begin with, but that being said, she does bring all of her mon with her basically everywhere she goes.
Alternatively, Mary has a fair number of catches but they are all more of the result of her tendency to visit haunted locations for fun so her collection of ghost friends tends to grow. But much like Jin, she brings almost all of them with her. The ones she doesn't hang back at home with the family while she's traveling.

Jin would've been helping people even if it wasn't her job, but she's happy her job allows her to help people she wouldn't have met if she wasn't working there.
Much in the same way, Mary is very fulfilled that her work can connect with so many people and help to bring happiness to them.

Mary would want to apologize to her parents for not being able to save them. She was just a kid though, and nobody blames her but herself and especially her parents wouldn't want her feeling like that...but the feeling's still there.