. . . a boy, as pretty as a girl. . . "What god is within that body, I cannot tell, but a god there is."
~ Book III, "Acoetes" and "The Fate of the Lydian Sailors
I think Bacchus is the central reason I have chosen to build a room for Ovid in the agent-child wing.
Because the lineage of the Roman pantheon form the links between stories, links between generations in the long chain of stories about changing, children feature heavily, but rarely as in the state of childhood. This is probably partially because "marriagable" age was 13-14 for girls, and 16 for boys. More often children are simply gods, nymphs, or humans of the next generation. With Bacchus, though, because he is born of a dead mother (yet another of Jove's rape victims) and gestated in his father's thigh (twice-born) his birth is unusual among stories that often become frustratingly repetitive. Bacchus's guardian gets himself turned into something, or dies of grief, and so the child is alone on an island, and is picked up by sailors who begin this "new" cult of Bacchus, of rousing and riotous worship. These are all things that happen to him, though. The child itself, Bacchus the boy, displays great power aboard the ship, proving his divinity and punishing those who disobeyed. He is an agent with judgment, discernment, and the ability to make things happen according to his will.
Bacchus's origin story, and Ovid's own frame for the story make the child first an object of protection, and then an attracted gaze. As a god, the fear he creates in his worshipers (though they seem little inclined to dwell on fear) indicates that for them as well, he is no longer merely an object, but an agent, and bearer of voice, will, and power.
Iphis, engaged to Ianthe, is another fascinating snippet. Because her father swore that only a male child should survive to be raised (money?), her mother raised her as a boy, and her father engaged her to Ianthe, with whom she fell in love. Iphis's wish (to be with Ianthe) is granted by the gods, who solve the problem(?) by making her a man. Iphis's childhood is co-opted by her mother, for the child's survival. She is given a man's life without her consent, but she gains some agency after she falls in love. The wish is hers, but the power isn't. Does she truly have agency? Is her love a consequence of her gendered upbringing? Unlike Bacchus, Iphis seems to be functioning in a "childland" story, where the child is interchangable under a system of education, on a scale of identification furthest from the Empty Child. The reader isn't meant to "be" Iphis, but also isn't meant to observe her as a case study either.
Adonis's childhood slipped by very quickly, but his birth and parentage were remarkable. As a sign of agency, Myrrha's seduction/rape of her own father weighs heavily. Also significant that to a much larger extent than Byblis who loved her own brother (Caunus), the narration/Ovid condemns the woman's "unnatural" choice in life partners (unlike Iphis's, which was noted as being unnatural, but not condemned because she became a man). Men are never the originators of incestuous temptation in these stories, and Caunus resists, and Cinyras kills himself when he finds out. Both women, though, know that what they want is forbidden, but seek it anyway. It's enough agency to condemn them.
More interesting than the repetitive male-female (etc.) relationships are the power relationships between types of beings. Gods cannot be resisted by anyone not a god, though male and female gods behave differently, and they have their own hierarchy by birthright. Children of any kind usually have the least power, and if an adult loves a child, the child not only has no possibility of resisting, but has little or no voice at all, which is why Polyxena's death scene is so remarkable. The princess Polyxena was taken as a human sacrifice, but demanded certain rights, including her virginity, her freedom, and her modesty. These were granted as her life was taken. The poet Ovid allowed her not only a voice, but agency and power as an example of noble self-sacrifice (though she doesn't seem to have had any real choice about dying).
Sybil is another remarkable break from the power-relationship between humans and gods. Apollo asked to be her husband (sought her consent), and attempted to bribe/woo her with anything she asked. She asked to live as many birthdays as the grains of dust in a pile. He granted her the wish, but she forgot to ask for eternal youth. Phoebus offered her that as well, but she refused his attentions and remained unwed. She does not accuse Phoebus of taking her, and did not bear him a child, but regrets that because she has become so aged, no one will believe that a god could ever have loved her.
But she resisted, and was not forced. Is there some qualitative, unspoken (in this text) difference between amorous attentions and the desire to marry that disallows rape in the later category? I shouldn't have thought so, but since when has Phoebus ever accepted refusal? I think in a stereotypical Victorian context, the difference would be the "quality" of the female, but what was it classically?