[Despite having labeled the communicator as not up to par originally, Mokuba was finding himself a bit glued to it. Therefore when he saw another girl show up under similar circumstances as his own he thought he might as well reply]

I'm sorry to be the first to tell you this, but your friends might not have come here with you.

[He hadn't thought she was rude at all]

I did find my older brother though.. so maybe they'll turn up too.