I love how she insults the player in her own way

Elite 4
"As you must know, I am the Champion, Diantha. Oh, but you are... You're the child I spoke to in Lumiose City and Coumarine City, aren't you?! Then that means that you are also the one that dear Augustine said... Of course! How could I--?! Oh, I must look like such a fool not to recognize you sooner!"
Read as "Big deal, you're still a noob"

Battle Chateau
"Oh my! I never thought I would meet you here! Honestly, I didn't!'

read as "You're just a pleb"

Battle Chateau 2
"What did you think? My team was pretty cool, right? It's a bit embarrassing to show off, but I love to show their best sides!"

Read as "My superior team shits on yours pleb"