Relieved? Obviously. She was relieved that she didn't have to kill the man she considered like her own family.
...
After a few minutes of being lost in her thoughts, trying to figure out all the questions that bothered her and thinking clearly about what plan she should pursue now, Iris finally looked at Xavier.
Sadness clouded Iris's features as she said, "I want to meet the real Eric..."
Looking at how sad she was made Xavier feel bad that he had to deliver such bad news to her.
Iris could feel that Xavier seemed to avoid talking about Eric, forcing her to ask what was bothering her mind now.
"X-Xavier, don't tell..." Her hands clenched into fists as she imagined the Demon, disguised as Eric, had already killed the real Eric. "Is he alive?"
"I apologize, Iris, but I also don't know. He is missing. Justin and the others tried to find him, but they had not yet found anything," Xavier explained.