At least she's aware of it herself...

You were talking to her as if she exists.

Have you ever met Ooi?

But I know about her,

because we're best friends.

Since a loooong time ago. Since way before I was born here. Read as "born" but written as "constructed".

I know about her expressions, her gentle voice, and her tender warmth. I know about it all.

I'm sure that Ooi-chi is calling out my name as well.

That's why when we meet for the first time it will be "long time no see" instead of "nice to meet you". I'm sure Ooi-chi would prefer it that way as well.

I really want to meet her soon. When I'm paired with her we're strongest combo after all.

...So that's why.