Callist: female, split from her Astrohydra body (her other two sister heads) and now in her solo body, bisexual, skilled in any combat, doesn’t need oxygen, pretty good swimmer, charming, shy, wise. Tiamat: female, sea serpent, extremely territorial, vicious, the most powerful titan underwater, owes her life to Callist for saving her from a human trap instead of killing her, overprotective, sassy, sarcastic, feared by many. And of course, they’re in love, but won’t admit it.