First encounter with her on Southern Island.
"... Who are you?"
"Yes. For the time being...get away from me. The Pokemon behind you... Its Mega Stone... No more...no less. That is what... That's what we of Team Magma seek. How about it? Will you get away from me... or not?"
"... Well then..."
"Deleting..."
Very robotic, gets straight the point, little to no emotion. She even calls getting you out of her way "deleting" you. But then you beat her in a battle:
"... Slurp. ♪"
"As anticipated. Unanticipated. You. Target lock...completed. Commencing...experiment. You. Forever. Aha... ♪"
"Returning home."
She's essentially malfunctioning here. Up till now she didn't think many could get in her or Team Magma's way, especially a kid. But here it is, her, a top Team Magma admin, being defeated by an unknown kid. She's having a difficult time processing what just happened, even after getting back some of her posture. She and her grunts retreat nothing else can be done (and for her to get her thoughts together).
Next encounter is at Mt. Pyre:
"...Ha."
"... ...Analyzing."
"...Hah. ♪"
Odd (and unnerving). Defeating her:
Not the expected response, you talk with her again:
"...Again? That's unanticipated. ...I knew it. You...are interesting! ...Haha. ♪"
"I'm looking forward to... I'm looking forward to... When we...can meet again."
Now we see some of her thought processes. Unlike Tabitha and Maxie who considers the player a nuisance, able to put their loss aside and recognize the player as a new threat, Courtney is like a machine. She had already identified who might be a threat to Team Magma, yet this kid comes out of nowhere and proves that, despite all her figuring she was wrong. But she can't just let it go, now there's a new threat. In order for her to plan and predict she feels she has to know who the player is. She becomes obsessive, at least when she expects the player to appear. She could also maybe be feeling excitement, adrenaline from not only getting into a battle but then losing that battle. Before she had dealt with and figured out who she could or couldn't defeat that she made herself dull to these moments; she wouldn't be surprised or feel anything if she lost to Archie, the Aqua admins, or Pokemon League officials (since she probably would have a plan B). "But why would she feel this way battling the player a second and third time"? You have to remember in the games the player character is sort of a strange phenomenon, while most NPCs stay the same the player is constantly changing things up and gaining new achievements. They aren't in a static state, each encounter might as well be a new encounter.
In the Magma Hideout this all comes to a head:
"... ... ...I knew you would come."
"...Too bad, though. ...It's all over now. ♪ ...The submarine has been upgraded."
"...Look. ♪ ...At that drill. ...With that...even the seal on the Seafloor Cavern is in for a walloping! ♪"
"... ...There's still more...work for me to do. ...I must...stop you. ...Until Leader Maxie...departs... ...But... ...Now...I just...want to... ...With you... ...I want to...engage... ...You... ...I want to...analyze. Ahahaha. ♪"
She's pretty much as her breaking point. On one hand she wants to see what else the player can do, but also realizes that the player may very well be able to stop them. I don't think Courtney would have tried leaving as she in the episode, I think eitherway she would have wanted to stay behind and battle the player (either Maxie ordering her or her volunteering). That way she gets to see what more the player can do while also buying Maxie time he needs.
"... ...Change...the world."
"...Leader Maxie... ... ...Mission... ...Complete. ...Leader Maxie...has departed. ...For the development...of humanity. ...For our...dreams... ...To you...whom I had not foreseen. ...I will give a hint. ...So that you...may dream...the same dream as us. ...Leader Maxie...is headed for...the sea stretching out from Lilycove. ...In the depths of the sea...lies the Seafloor Cavern. ...What are you...going to do? ...Looking around...in seaside towns. ...That might work. ...Ahaha. ♪"
"...I don't know...what you could do to get there. ...Even if I knew...I wouldn't tell. ...Ahaha. ♪"
So this is where it gets interesting. Now that she believes Maxie is on his way to release Groudon (thus creating the new world) she still wants to see what the player will do. She tells the player all she knows and watches them go, letting the game continue. She's caught between her mission and her obsession at this point... so what happens when one overcomes the other? In the Delta Episode we see the aftermath of the player stopping Team Magma and Maxie realizing he almost ended the world, and how Courtney took it:
(Petalburg)
(Talking to Wally)
"Tedious...bothersome...child...You should...just be quiet...and give me...the Key Stone!"
"I already know...that you can...use...Mega Evolution!"
(Player arrives)
"...?!"
"...You."
"Aha. ♪ Nice timing...maybe. ♪ I'll be taking...yours first! Give me...the Key Stone!"
(Defeating her)
"Huh..."
"...No! You're always meddling! If that's...how it is...at Meteor Falls...the Leader's...Key Stone..."
(Mossdeep Space Center)
"...Ha ha. ♪ Ahahaha! ♪ Ahahahaha haha! ♪ ♪ ♪ Ahahahaha hahahahahahaha! ♪ ♪ ♪ ♪ ... My team...The team I put all hope into...Leader Maxie...was broken. He was broken! He was broken by this brat!"
(Battles player)
"Don't. Get. In. My. Way."
(After defeat)
"Why? Why must...you always...Always, always, always, always...Get in my way!"
It was all fun and games when Team Magma was near completing their plan and the player was trying to stop them. But now that the player stopped them and Maxie has probably isolated himself to think she feels she has failed. We've seen how she's been acting from simply not predicting there might be another strong trainer, so how do you think she was going to react to failing? Suddenly her obsession turns from interest to hatred for the player now that the player had stopped the game.
Finally, at the end of the Delta Episode, Courtney finally takes off "the mask" she made for herself. She realizes she's a person, she has emotions, and instead of dwelling on things she and Team Magma should work to improve everyone's lives. She also becomes friendly toward the player and greets them like a normal person would.
To me Courtney is a character who decided to model herself after a machine (she probably has a mental disorder and found things are easier to understand/handle as a machine would) and though she had everything calculated. Than there was one thing she didn't plan on and, due to her way of thinking, couldn't really handle not knowing why. This made her obsessive and excited, even going a bit against her team's goals just to see the game continue. But when that resulted in Team Magma's plans being foiled and her idol, Maxie, becoming distant she feels its her fault so starts trying to fix it (and not understanding why people are trying to stop her thus her hating everyone). When its all over and she's meeting with Maxie she isn't able to keep it in, she let's go of her previous beliefs to better help Maxie, Team Magma, and hopefully the world (a world she probably feels an outsider too and just wanted to find a place in).
In the episode I didn't feel she was a machine logic person who is going a bit crazy but someone who's meekly naive. It felt odd she acted "normal" when with Team Magma, "whimsical" on her own, and then "crazy" when facing the player without much connecting the three personalities. Opening a can of worms here, I sort of see her being autistic, not multiple personality disorder.[/quote]