Corinne Rey, who uses the pen name "CoCo," posted several photos of members of the editorial staff who died in Wednesday's attack.
She also posted a message directly to the supporters of the satirical newspaper.
"Thank you for your hundreds of messages. Your support. Your affection. We will recover. Come out to demonstrate on Sunday. Thank you," she wrote, referencing a planned march this weekend.
One of the three photos she posted shows her former boss Stephane "Charb" Charbonnier signing one of his books.
The message, written in French, says: "Neither god nor master ... I miss you so much. It remains standing."
The photo shows Charb drawing on the title page of one of his books, which was titled "Neither God Nor Master!"
The "it" she refers to in her tweet is likely the magazine that was so dear to the editorial team. The remaining staffers have confirmed that they will be putting out an issue on Monday, just five days after the attack that left nine cartoonists and contributors dead, along with the building's doorman, a police officer and a body guard who had been ordered to protect Charbonnier.