She ignored what he said and asked, "Are you in or not?"
He replied confidently, "I'm in."
She nodded in satisfaction and said, "Good. We will go there directly after the intersect competition."
She had said all that she came to say and had no intention to hear what else he had to say, so she turned and flew away immediately after speaking.
After she left, Thor asked him, "What's that about?"
Arthur thought about how to answer the question as simply as possible, so he replied with a question, "Have you heard of the fishing game?"
The fishing game is what Elder Storm Hawk was asking him about. She had first asked him about it when he reached the fourth transformation and was able to use the divine lightning armament for the first time.
At that time, she didn't say much about what exactly it was. She had only said that he could participate in it when he reached the peak of the second mortal coil.