His body can be toned, a swimmer's build instead of the niche-appeal gauntness of someone who doesn't like eating. His eyes can be deeper, clearer, bluer; his hair, less mahogany and more inky-black, with a bloody red underneath if it must be lit just so. Teeth, white and shining and neat like an American movie star, but just a bit too sharp. He doesn't need hair below the eyebrows - sculpt those a bit, while he's at it - though he'll maintain an exactingly neat pubic triangle, just because it looks a bit less plastic. As for what nestles within that triangle, well, he's not going to be ridiculous, but he's not going to be pious about it either. (He adds a freckle, for eye-catching asymmetry.)
His skin will take nicely to the soft shimmer of Nymph scales, and the Erinyes' "runny mascara" tears can be manipulated, just so, until they're more of a long, fading cat's-eye with a deeper shadow in the socket. (Perhaps he was lying down, when he wept those tears.) And the wings, of course, glossy and magnificent. The Nymph fins stymie him for a moment, until he realizes he can draw the webbing back like so and stretch the spines thus, and then they're more horn than membrane, and nestle into his hair for a bit of devilish appeal.
Wipe away the scars. Leave a few, the trophies of victory or defeat - the jagged line along his forearm, the round burns clustered on his shoulder like freckles, the divot in his eyebrow. (Admittedly, that last is less for the memories and more because he likes the visual effect.)
He looks himself over, a vainglorious Michelangelo. After some thought, makes his fingernails black and shining; after some more, makes them just barely nacreous; after still more, changes them back.
"I've done what I can to improve on perfection," he says solemnly.