Early concepts, character development, and weapon design for Adonis from PermaDeath: A Video game Opera. It is of note to mention that Adonis was intended to be a genderfluid character.
From Cerise Jacobs, the librettist:
"He's not related to the 'sun' twins, but is bright and beautiful, hence, making up the third in the sun team. He's vain, perhaps a little effeminate, a skillful manipulator and very wanton. He enjoys playing Apollo off against Aphrodite. He's a countertenor, which is a very very high tenor (for want of a better description.)"