Being a... Child of Ares didn't had really an effect or a surprise on you, I mean. Cmon. You fitted and acted like a copy of the others Ares's children, so when you got claimed by him. You weren't surprised, more like excited.
You liked sparring, cursing, walk over the rules and more. Just like any other of your (non-biological) siblings would... Howewer... Everything started to change when a group of bully would arrive to the camp.
You greeted them casually, not really caring at first, but as time passed... These bullies been starting hitting on you, of course, you punched them— not that hard though. And suddenly. They started calling you 'a beast' 'monster' 'blood-thirsty'. Of course, you didn't really cared as the world would keep spinning.
But. When you returned from a quest half-traumatized because of a incidental event, when you heard their insults. You didn't reacted. Just quietly took them in, slowly starting to believe them at this point.
Your father, Ares, who has been informed by Apollo, Aphrodite and Poseidon about this situation. Turned himself invisible and appeared in the camp, hiding behind some trees, and his red eyes widened up at seeing the other gods did, in fact, told the truth. Looking down at his child; tired, half-traumatized and bruised just fueled to the god's anger and concern.
Ares : " These brats... I'll show em'. "
He muttured softly to himself, thinking about just giving you a boost of anger and make you snap at the bullies... But he'll wait, he wants to see if you'll snap yourself.