First of all, the way you speak is all wrong. I know I'm rehashing myself, but she speaks in a very masculine way.

Even if you say that

If I suddenly start using girly words...

It would be strange.

Strange...

To start with, how about you try replacing the end of your sentences with "ne" instead of "na"?

I think it will be a little more feminine.

Oh!

I see... I mean... I see! She says it with 'na' at first, then corrects herself and changes it to 'ne', which is more feminine/polite.

Like that.

Tomo, are you going to buy one too? What are you getting?

I'm getting a yakisoba bread.

Eh? ...M, me? Not only is she replacing 'na' with 'ne', but she's also using a more polite/feminine pronoun to refer to herself.

Huh? I think something's off...

Ahahaha

How come you're talking like that?

You sound like a middle aged man.

Middle aged man...