Iris had enough, she knew where Abby and Cedric came from, because she would stand against the world for Cane if she were on her shoes.
But unfortunately, Iris was not Abby and she had her own situation and responsibility, she had people that she needed to protect too.
Iris could understand what Abby felt, but they walked in different path.
"Move!" Iris snapped at Cedric. Even though the warrior tried to protect Abby and Liam, he was still her protector and just like when she called for them to prevent calamity from happening, they needed to answer to her.
Only her.
Therefore, when Iris ordered him to move away, Cedric couldn't deny the direct order, he moved aside and Abby was ready to take Iris, even though she knew her power was not on par with the luna.
However, Iris's aim was not her. Her aim was obvious. It was Liam, who stood behind Abby.