So when I bought my first two budgies, the lady who sold them to me told me it was a boy and a girl. I got those budgies because I had found my now yellow budgie in the yard eating my chicken's feed haha so I got her two companions. It was fate

The boy flew away eventually--he was super adventurous. Now I still have the "girl" but I think she's a he after all haha.
I would like to ask you all to help me identify what gender my budgies are

Thank you for your time!!
My blue budgie (named Kairi) is the one we were told was a girl.
My yellow one... (Sora) I believe she's a girl lol. She's the one we found in our yard.
And my snowy one (Vanille), well I was told she was for sure a girl but now I'm not sure about her anymore either

I got her along with Jupiter and she will be lonely without him around now so I'd like to make sure I bring her the right companion if that time comes