Auther: I knew that Guitar Villain airs before Pixelater but this is the order of how things happen in the show
Chloe now wanting to be good for Cat Noire's sake, now treated Sabrina no longer as a servant but this upsets her as she thinks that this means they are no longer friends and is akumatized over it, becoming what she called herself Maid For Service.
She had snow-white skin, hair black as night, she was wearing a black dress with puffy sleeves, a white apron over the dress, white gloves, white socks and black high heeled shoes
She now at super speeds cleaned up the streets with a mop, having watched that an Akuma is on the loose on the news. Adrien transforms into Cat Noire and immediately calls for Ladybug but receives no answer, so she goes off to fight Maid for Service alone. Who Cat Noire tries to catch but fails due to Maid For Service's super speed who kepts hitting Cat Noire at super speeds. That's when she is tripped by a yo-yo set by Ladybug, which knocks Maid For Service out cold. Allowing Cat Noire to "Cataclysm!" Her Akuma object, her brooch.
After the fight Chloe explained to Sabrina that their friendship isn't ending but upgrading which Sabrina is happy about.
Pixelater
Adrien was upset that Chloe could not find him a job that required taking photos at the hotel their class was working at but ultimately did not blame her for the fact that the hotel did not have any positions that would require that. So, he didn't question that he had the same job as her until it came out that Alya would be sorting junk. Adrien then stared at Chloe who said "What? It's a real job, somebody had to do it. It's not my fault it's her, I swear on my heart." She said while putting one hand over her heart, Adrien didn't believe it. Then Jagged Stone (Adrien's favorite music star) came into the hotel, bringing with him an unwanted fan (named Vincent Aza and no it's not the same Vincent who photographers Adrien) who was secretly taking Jagged's photo until Jagged's crocodile came up to the Vincent Aza and scared him. Causing him to reveal himself to everyone, causing him to get kicked out which caused him to get Akumatized.
Sensing That Vincent Aza was Akumatized, Adrien snuck away and transformed into Cat Noire. To only come back and find Chloe about to be taken a photo of by the Akumatized villain Cat Noire dubbed the Pixelator. She then pushed Chloe down, which made both of them avoid the blast while Cat Noire was saying "Look out!" "Thank you Cat Noire, I knew not messing with the student's jobs would come back to award me!" Cat Noire felt both happy (for Chloe not messing with the student's jobs, meaning she was changing) and guilty for not believing Chloe but decided not to dwell on that right now as she had a super villain to stop. So, she grabbed a reflective plate and reflected the blast from Pixelator back to him. Causing him to disappear except for his Akuma object, she first toke a picture of herself getting her to the picture of Pixelator. So, she can use her special "Cataclysm!" on him freeing his victims including herself who then broke the Akuma object with a normal "Cataclysm!"
Penny, Jagged's assistant gave everyone (including Chloe) a ticket to Jagged's show. Who did not dedicate it to anyone