Yako fidgeted, still hesitaing about joining the party or not, before finally giving in and following Naoya. When Reno came over to their new member, she offered a weak smile. He was one of the people she had attempted to ignore the most.
Reno knew about her 'blackouts' which were triggered by rage. Reno had probably head the destructive little post on the Network. Reno wasn't an idiot.
Yako didn't want to see Reno's reaction.
But she had to admit that actively running from other people because she was embarrassed was rather silly, in retrospect. So she brightened her grin and waved.