Ronan was not really as calm as he appeared on surface; facing Percy was a psychological challenge for him, because right from the first time they sparred, he had always been overwhelmed by the more experienced and higher levelled Percy.
However, rather than shying away from this challenge, Ronan quite looked forward to it. He felt that out of everyone he knew in this country, Percy was the only one around his age group that needed to be looked up to and work hard to surpass.
Ronan's blood boiled for a good fight. It was a natural instinct for him.
He did not shy away from strong fights but rather actively sought them. For him, a good fight satisfied a deep itch in his soul that he felt incomplete without.
Staring into Percy's scarlet eyes, Ronan knew that his brother was serious. He knew this from his experience at home; whenever Augustus or Alexander had their eyes turn red, they were serious.