Pretty much. They sounded kinda sad for some reason. Maybe because it's one less ally to help fight akumas with?

[Well if Nino were honest, he did feel a little bad at Ladybug having to tell her no. Anyone would feel sad if they couldn't be a hero anymore and he wouldn't be much better off if Ladybug told him he can't be Carapace anymore.

Now that there's been some time to have his tea cool, he picks it up and takes a sip. He tries not to make a face at there being so much sugar. Well she's clearly been trying. That's saying something.]