After glancing at Rocky, Liliya hurriedly introduced that the young man before them, who was about the same age as they were, was the son of the Chairman of the Eternal City Committee!
Like the Sky Alliance, the Eternal City wasn't owned by any one person; it was governed by a committee. Thus, one could imagine how high the status of the Chairman of that Committee was. Liliya's introduction to Rocky was naturally meant to inform him of the young man's identity before them.
After listening to Liliya's words, Rocky indeed was startled, having never expected that someone of such status would come to see him.
As mentioned before, based on various 'encounters' after arriving in the Eternal City—from deliberate reception to being followed and surveilled—Rocky had essentially concluded that the Eternal City Committee and The Three Great Alliances were in cahoots, so he hadn't anticipated that the Eternal City Committee would send someone to meet with him under these circumstances.