In Pokémon X and Y, Malva appears as an Elite Four Trainer of Kalos. She is a self-proclaimed Holo Caster star. In addition to this, she is a member of Team Flare and expresses animosity towards the player for the team's defeat.
She also appears in the Lumiose City Looker sidequests, where she is blackmailed by Looker into helping the player stop Xerosic's plans.
"You're the illustrious <player>, are you? Welcome at last to the Pokémon League. I am one of the Elite Four. People know me as the Fire-type-Pokémon user, Malva. Here in the Pokémon League, you'll encounter the four of us--the Elite Four--and our Champion. If you hope to meet the Champion and challenge her here, you must first defeat the four of us. Do your best, because if you can't impress us with your real strength, you'll never get to battle her. But it should be a walk in the park for you, right? The "hero"/"heroine" who destroyed big, bad Team Flare."
Initial battle
Before battle
"Welcome, challenger, to my Blazing Chamber! I am Malva, and I shall be your opponent today."
When defeated
"What news... So a new challenger has defeated Malva of the Elite Four!"
After being defeated
"Fantastic. Utterly fantastic. I'll report to all the world the news of you and your Pokémon dominating the Pokémon League! I AM a Holo Caster star, after all. Heh, I'm such a busy woman... "
General afterword
"<Number> more members of the Elite Four stand between you and the Champion. Take that elevator there to return to the main hall if you're ready for them."
"Took you long enough, <player>. It may happen that I am in need of your services, but I expect you to keep in mind how valuable my time is! Oh, never mind! Just fight me! I can't possibly have a reasonable discussion when my emotions are so inflamed!"
Yes:"I'm burning with rage!
No:"
When defeated
"Hmph!"
After being defeated
"Enough for now. I brought you here for a reason. The first issue is the identity of the Trainer called Essentia. In truth, she is simply a girl called Emma, wearing a piece of special technology dubbed the Expansion Suit. The Expansion Suit was created by Dr. Xerosic. I can see that name means something to you. You remember him, I take it. ...One of Team Flare's scientists. This brings me to my request, young man/lady. Make sure Xerosic disappears. I don't care how. If you need a reason, call it honor among thieves. Even we in Team Flare had our sense of pride. You may have disagreed with us, but we doing what we thought right. I won't let him sully our honor now. The hero of Kalos would hardly wish for that girl Emma to keep staining her hands with these crimes as Essentia. If you want to help the girl, you need to put an end to Xerosic. And that I can help you with! If we leave now, we can find him at Lysandre Café. Don't dawdle. Be ready to face death if you go. Prepare well if you want a shot at surviving."
Lysandre Café
"Oh my. Aren't you a speedy one? Score one for you. I do so hate to be kept waiting. Come on. I'll show you the way."
In Lysandre Labs
"You'll find Xerosic in the lab. It's a secret floor that only certain admins know about."
"You'll need to take the elevator. I'll just enter the special password on this panel here... And voilà! Now you have access to the secret floor of Lysandre Labs. You should find Xerosic and his Essentia there. The rest I leave to you. The secret floor has the same layout as this one. You defeated Team Flare once, right? Then this should be a piece of cake. Oh. And one last thing... Tell that partner of yours... Tell that infuriating man... Yes, tell him I fulfilled my end of the bargain. And he should keep in mind what will happen to him if he doesn't do the same. Good day."
Names
Language
Name
Origin
Japanese
パキラ Pachira
From the genus Pachira and possibly きらきら kirakira (glitter, sparkle)
Team Flare 
