kohga is another one of my army of bisexuals. he seems easily swayed by hot people regardless of gender. and is eager to sway people regardless of gender. he is well-beloved and charismatic and definitely weaponizes this!
also, i'm not sure if this is some branch of aromanticism, or a shield he's put up to guard his heart, but i think as a quasi-immortal, he's Very hesitant to commit to romantic partners. he is guaranteed to outlive them. this knowledge, despite having Had it since he attained his long lifespan, is still hard on him. but i do think he has sort of a line of deceased beloveds he looks back on fondly. but it's tough to land a spot by his side! he doesn't just let any old shmuck in. being the partner of the one and only master kohga takes real effort and dedication!
also he's definitely somewhat of a crossdresser. i'm not sure it means anything gender-wise, and if it did, i think he'd be too culturally different to slap any terms on him more familiar to me. he has no problem taking on the guise of others, regardless of gender, as evidenced by him taking the form of urbosa. he'd even like acting as a woman for a while! but he'd still be attached to his own masculinity when the costume comes off. his burly, manly physique, one might say.