i like to characterize gudako as being friendly and kinda goofy but also a bit too reserved to be totally open with people (mainly when shes in love and/or horny)
i think writing gudao would be similar though i'd prolly make him care a bit more about seeming mature and responsible and what not
mostly just to differentiate the two but also cause if i did write a kink story focused on gudao itd be about him being forced to crossdress and teased abt it lol so itd help make the story more exciting