@King Cosmos quick question, is Alina's second mouth inside of her first mouth like a xenomorph?
Kind of. It comes out from her mouth, out of her throat if you want to be specific, but it's not visible if she just opens her mouth.
I know it's kind of a cop out, but I was picturing it as kind of just disappearing when she isn't actively using it; it is six feet long I'll remind you. Either that or it just folds up really, really small in her esophagus.
Since it's basically a hollow tube that doesn't actually need to connect to anything to work, maybe it just flattens itself out and wraps around the inside of her skull like a hummingbird's tongue.