"Wha--" Athrun's face turned red, but then he realized that Euphemia had fallen asleep. He tried to calm himself.

It took a few minutes, but he eventually did. And when he did, he carefully wrapped his arm around Euphemia's shoulders. He didn't fall asleep, but he did look out the opposite window, keeping her head within his line of vision. He'd remain that way for as long as she slept.