It's like the crushes you get in kindergarten when you compete with your love interest and taunt them. :wub

Let her down easy, Ko-chan!

What? That is totally untrue, lol. Keiko just said she was an immature child(those were her private thoughts, mind you), which she is. >_> She didn't comment on her skill level, that was Iyana being doubtful of little Keiko.

I would also like to add Keiko is still unimpressed since probably no one would have landed their attacks or did their attacks unscathed had she not restrained the beast with awesome mokuton.