NAME- Nicholas Kyle Dunamis
He will look like Sesshomaru(like hair and eyes) but with hints of Archer Shirou(like the skin tone) without the markings on his face and body.
In his wish
Because he named Gwen Tennyson-
He will have a female form with reddish brown hair and green eyes.(basically Gwen)
Because he named Mark Grayson-
A buffer male form with raven black hair and grey eyes.(basically Mark)
Because of having both a male and female form he will be slender like anime male figures and not have that much muscle(but still will an aesthetically pleasing figure) but will have access to all his powers in this state.
In his Gwen form his Viltrumite powers will be suppressed.
In his Mark form his Anodite powers will be suppressed.
His ability to turn into Gwen and Mark is a byproduct of his future shapeshifting abilities.
Before his abilities truly awaken he can use minor magic abilities in his Gwen form and will have an enhanced body in his Mark form.
The reason for this being his homo magi abilities and Anodite powers merging and his adaptation metagene and Viltrumite powers merging.
This initial power merge is both a good thing and a bad thing--
Good because he can have early access to his powers and the merge will be based on his human self so even with the dominant nature of the alien DNA he will not be majorly Viltrumite or majorly Anodite like Mark and Gwen.(just part and this makes his DNA a mess to figure out, so no cloning or power copies)
Bad because thay will just cause more pain, a lot more as the alien DNA will continuously try to overcome his human DNA till his powers and abilities stabilizes.
in his normal form when he grows up he will look a lot like Archer Shirou just a bit more slender and the costume design will also be similar.
He can also interchange the color of his hair and eyes and also length of his hair in any of the forms which becomes easier as he uses it.