>>536294178
There are a few interpretations of doc.
But due to some official commercial art from a clothing line and the artbook we know they are relatively pale skinned and have medium length white hair worn in a messy ponytail.
Some in game CG's let us know doctor is a little under half a foot taller than Kal putting him around ~173cm tall.
If you want to take the anime into account (which you shouldnt because the director said its only their interpretation of the games story and not actually official) then they also have grey eyes.
Some voicelines add onto this such as multiple operators saying doctor constantly looks tired so maybe some eyebaggage, rosa says doctor is cute and roberta says doc has amazing skin and facial bone structure or something like that so doc isnt bad looking either.
He is being forced to go to the gym by gavial and Siderocas profile says doctor is finally putting on a bit of muscle but its not much, nice to look at i guess but nothing to write home about and may as well just be cosmetic with how weak doctor is compared to a terran.
Im probably missing more stuff but we have enough to piece together a bit of a picture of how doc should look being that doctor is probably a variant of Bishōnen