Question for my hero academia fans! :)

This is gonna be long sorry in advance I'm really excited ( I know this isn't really the place to be asking these questions but I like you guys here and I know a lot of you watch anime so-)

Do you guys have your own original characters? (oc for short) I was sitting here bored and I've been thinking about writing a story about my OC for a while now (months) but sadly I'm not that good of a writer x_x and I don't know if her powers make sense in the mha universe and I'm also worried about my quirk ideal for her already being taken and I'd feel awful if I created the story and somebodys oc already has a quirk that is similar or the exact same to hers but I really like the idea

So I call her quirk Air Force and she's just awesome to me XD basically her powers come from the air well oxygen itself and she's capable of putting up these walls created out of air and she can make them solid and change their sizes and shapes the backlash is she has to hold her breath so if she stops holding her breath her quirk will also stop working until she starts holding it in again I don't want to dive too deep into how it works or all the things she can do because I haven't really figured it all out yet but yeah I just wanted to share and ask a few questions for starters

1. Do you know anyone who owns a character with that quirk?

2. What should her name be? I was thinking of looking up a name that means air or something like that but feels really cliche and I don't really know

3. I can't decide if I want her to be a villain but I'm so tired of the heroes ヽ(`Д´)ﾉ DOWN WITH THE HEROS! ANARCHY

4. Any ideals for the plot if I do make her a villain working with the lov because she will most definitely be with Shiggy I can't I'm a simp I can't be serious about making one of these stories and not have my OC with him XD (btw I never plan to make this public and I don't want to steal anyones ideals unless you'd like to share them with me)

5. I want to be sadistic and give her asthma good luck holding your breath for long now (I probably won't do this but it's just an evil thought I had as I was typing this)