Caribdis' Discord portrait is Nova, and his Discord animation background is Nova holding Dione so... I guess his is Nova too lol
even if nova is his favorite, i respect that he gives all the girls equal screentime. outside the slight hint that is his discord pfp and banner, i would have absolutely no idea who his favorite girl is. even with his discord profile, im pretty sure it used to be a different girl, not nova. my mind might be playing tricks on me though lol