"The Sea is Wine Red" by gotham_girl on AO3
Since when had Ares been the responsible one? Apollo’s frown deepens as he hauls Percy up further into his arms like he was holding some type of disgruntled cat instead of a squirming teenager. His eyes narrow in a challenge. “He’s going to bring the Trojan army glory.” ... “This brat has iron skin?” Ares blinks. His eyes focus on Percy. The boy stops squirming, vaguely uncomfortable. “Should I have led with that?” Apollo asks sheepishly. “You think?” Ares growls stalking closer. He grabs Percy’s arm that Apollo is holding and inspects it further. He lets out a contemplative hum. Are’s calloused fingers feel rough on his skin, and he’s totally aware that he is being appraised as a tool and not a soldier.