Besides the name, the gods and demigod's appearance is also an important matter. Outside the mortal realm, a god or a demigod can't hide their true appearance so they are forced to change it to their real form.
Therefore, they need to turn their form or leave the mortal vessels. The rule is absolute. Since Viktor had his mortal body, he had to create one divine body before he entered the underworld gate.
Adonis looked at Viktor right before jumping into the endless red gate and said, "Master, aren't you going to change your form? It's been a while since I've seen your real appearance."
"I will."
"You look heavenly in your real form, master. Even my beauty surrender in front of yours"
'So he's well aware of how he looks. But he is wrong. If he lifts that magic seal from his face, even the gods will cry for him. I am nothing like his actual form. As expected of the descendants of the guardian of lust. He's as handsome as ever.'