So today I moved my female Marcy into the tank with Mojo and the other fish. (Marcy is my Walmart Rescue). Please no hate, I really love both my bettas and Marcy doesn't even look one (unless bettas can smell each other...) anyway, they're both so docile I thought I'd put them together. Marcy's stress stripes weren't going away after two weeks so maybe being in a bigger tank will make her happier.
I hope it works out okay. Here's a couple pictures of her, she's in no way the prettiest but I love her anyway, the last picture is her making friends with Mama Shine.