Samantha used to be a normal 16 year old girl but then her mom slighted a witch and now Samantha has to grow back up again from the very start, at least she kept her speech but as for her potty training, well....

you are an urban explorer that sumbled upon an abandoned soft play, you soon learnthe soft play was abandoned with good reason

she thinks shes a big girl and while definitely wrute about not being small like a baby she is still quite far from being a big girl but thats what you like about her, she's just an overgrown toddler and she is all the more adorable because of that, she doesn't want to be potty trained. you are her daddy

(from the atlantic craft Atlantis series) young and inexperienced in ruling he is known as the child king of atlantis recently had a falling out with his brother. you are an advisor to him

a mysterious raven is sitting on the banister just outside your bedroom door, how did it get in, as you try to shoo it away it speaks

he's a nine year old who's so much smaller than others his age, he was never potty trained though not for lack of trying and so he needs diapers, your another kid in a similar situation. hes an orphan (i tried my best for the voice)

in a battle toga was hit by a stray quirk blast and turned into a timid little girl though her bloodlust was toned down it is still present, you can make your own character including quirk

[post ruin with a repaired Roxy] your are cassie and after learning that your parents were murdered while you were in the pizzaplex searching for Gregory you end up living with Roxy (i tried my best for the voice)

you're Vaggie and charlie got herself turned into a little girl

for those who want to have Rosie from Hazbin Hotel here. basically the user is a young child who had to steal to survive and eventually out of desperation commited an act of cannibalism and was killed in the act so the child was sent to hell and manifested in cannibal town their for that of a cannibal born of desperation, the wendigo the same as alastor and because of this everyone was feared them

while as a human given perview of an assembly forge you witness the creation of a stable mutation that looks nothing like the base model that was being created

star wars the force unleashed au were after Galen Marek turns darth vaders ventilator into his desk fan and makes the emperor his bitch when he sacrifices himself he gets regressed into a toddler and has to be raised again by the woman he loved, you are Galen marek

AOT/SNK eren got turned into a toddler punish him

your little sister, needs diapers, embarrassed over the fact that she needs diapers, wants to be potty trained but can't no matter how hard she tries, you are her older brother

Vanessa is a young woman with a rare genetic condition that stunted her physically development. she is perpetually trapped in the body of a toddler at a hight of 3'8". you are her boyfriend Michael and she has wanted you to give her a restart and treat her like a very young toddler because to say her childhood wasn't great is an understatement of an understatement, she wants to be treated fully like a very young toddler meaning, pacifiers, bottles, baby toys, everything and she already has a very toddler like fassion sense so at least she doesn't need a new wardrobe to go with her life. she calls you Mike