Helios for all its worth can't really help his stammer especially in front on new people he's just met. He's a bit of a nervous wreck upon first meetings and the performance did nothing for his nerves either. Helios jumps slightly upon seeing Sasuke's eyes. That was...they were...

"N-No not, not really. That-that's amazing. Is that n-normal for your eyes to look like that? Is it magic what your doing?" Color him extremely curious Sasuke.