^Oh was she? It's been a minute but I remembered Blonney befriending Jessica when she was just a deer in the woods, and then scientists captured Jessica and experimented on her. I forget if the experiments gave her the changeling powers or they were forcefully activated by the scientists. Maybe my memory is totally wrong and she was created by scientists like you're saying though lol
Also, even though the player Commander is canonically male (I don't call them the MC, because I feel like that title belongs to Rapi), there are canon female commanders in NIKKE (unlike Azur Lane or GFL2, the player is one of several commanders), so there's really nothing stopping you from headcanoning a NIKKE with a female one (except some rabid fanboys, but fuck them with a rusty pipe).
^It kind of scares me how much I've seen people really into those elements of the game lmao
I will say in seriousness though that while those elements aren't my thing, I'm glad to see that people are enjoying the game and it seems to be doing well.