Ladybugs are good bugs that eat bad bugs like aphids, they do not eat plants.
However, unless you have aphids or other pest, she will have nothing to eat and might starve to death..........best put her outside so she can live a normal life.
Lady-bugs(beetles) are very different from Asian beetles, Ladybugs are highly beneficial predatory insects but will move on fairly quickly without a population to feast on, they don't eat the plant or anything bad like that. Asian beetles on the other hand, aggressive, smelly.
growdiaries.com/diaries/187226-grow-journal-by-ultraviolet/week/1117955
Good pic of differences on one of my grows.
I would leave it in there. I had hundreds in my first grow because I though I had aphids lol They didn't hurt anything. It may help with aphids or spider mites if they show up
It’s up to you whether you want it in there or not. It definitely is a predatory bug that goes after pests.
Some people buy lady bugs to control bugs.
I don’t see a problem with leaving it there.