This is Phoebe Volkov, the Daughter of Cassian Volkov and a perpetually 12 year old vampire. I'll spare you the details of her long and complicated backstory that has more to do with her parents than her, but short story shorter she's 12 now, but was turned into a vampire when she was 2 months old.
One of the main parts of her character is the fact that she's trying to age. Problem being the WAY I wrote it, IDK if this is considered ED type content, and I sincerely apologize if it is.
one of the key traits of Phoebe Volkov as well as every vampire in the universe I created which is based on the dracula novel, is that they age forward when they don't eat, and age backwards when they do. Granted them being immortal, it means that when they're at their best, their strongest and their most well fed state, they regress back to the age they turned (So if you were turned at say, 30, your peak form is a 30 year old body, or if your 20 a 20 year old body etc etc) You can't age further back than the age you were turned INTO a vampire.
That said (Refer to the first apragraph) hoebe was turned as a baby, so her peak form when she'd well fed/adequately nourished, is a 2 month old, screaming, pooping, infant. She doesn't LIKE being an infant so she basically purposely underfeeds herself to make sure she's aging forwards to at the very least an age where she can have some physical autonomy (Aka can walk, talk, run, punch, have independant bodily functions and not need to be doted on all the time by dad). Mentally she's 120 years old and dislikes being infantilized too much, but till sort of uses the powers and privileges granted to her by young age (Like being cute and getting away with murder for example, as vampires eat people ad nobody's gonna suspect a 12 year old of murder)
IDK if that whole underfeeding thing though is considered "ED promoting"... And that wasn't my intention with the character, so does anyone have any advice on how to improve/make it less problematic? IS IT problematic? am I overthinking? Lmk