I can think of some reasons:
β’ It seems that she just appeared right out of nowhere thus they were startled that she was suddenly there.
β’ They didn't notice she was there in the first place since they were all busy looking at the 4th wall.
β’ They don't know her. In a meta standpoint it makes sense since at the time the original version of the artwork was made (2011) she didn't even existed. She's relatively a new character compared to the rest of them (2012).
β’ She looks radically different from the rest:
β’β’ She's doesn't look "anime kawaii uguu~" than the rest of them. In fact she's the opposite.
β’β’ She's a 30 something adult compared to the kids and teenagers she's with.
Go ask the artist who made this. Here's the source.
You'll get a better chance of getting more accurate answers than asking us.
Top Comments
John Mirra
Mar 03, 2014 at 03:43PM EST
Jiminy
Mar 04, 2014 at 02:57AM EST in reply to