It's not really a misunderstanding. It's how you presented her and the exact sentence you wrote out. How her name being masculine when she's a girl is a kind of running joke. I'm saying if you are trying to appeal to readers looking for that kind of rep, might want to avoid that. I mean that's the implication I'm getting since you shared it on a thread asking specifically for these kinda characters.
And if she has no actual given gender but generally feels female, then yeah by definition some might say she's trans, but, and just saying here, if she's "not meant to be trans" then why exactly would you post it on this thread? I mean it's kinda like saying a character is gay on your Twitter or whatever when it's never even touched up on it or even mentioned at all in the story.